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Counties in Iowa

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Districts in this state

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Iowa

2022 population: 3,200,517 ( 154,162 from 2010 , 10,145 from 2020)
Land area: 55853.2 square miles
Population density: 57.3 persons per square mile

2022 Census data
White:	2,679,799	83.73%	0.8%
Black:	134,424	4.20%	54.7%
Indian:	9,966	0.31%	16.1%
Asian:	93,266	2.91%	71.5%
2+ races:	61,257	1.91%	47.0%
Hispanic:	221,805	6.93%	46.4%

Total non-White:	520,718	16.27%	50.8%

2020-2022 Components	Number	Rate
Births:	82,052	12.9
Deaths:	79,003	12.4
Net Migration:	-6,877	-1.1
Net Immigration:	13,248	2.1

Change in White population:	-21,324	-0.7
Change in Non-White pop.:	175,486	5.8

Historical Presidential Election Results for Iowa

Recent Trends
	Votes	Δ Margin	Swing %
2020 vs. 2016	R +96,689	D +8,703	D + 1.8%
2020 vs. 2016	D +105,392	D +8,703	D + 1.8%
2020 vs. 2012	R +167,055	R +230,538	R + 14.3%
2020 vs. 2012	D -63,483	R +230,538	R + 14.3%
2020 vs. 2008	R +215,293	R +285,172	R + 18.1%
2020 vs. 2008	D -69,879	R +285,172	R + 18.1%

2016 vs. 2008	R +118,604	R +293,875	R + 19.8%
2016 vs. 2008	D -175,271	R +293,875	R + 19.8%
How to interpret this table

Click on the Year to view county-level data for that election.

Year	Turnout	Winner			Runner-Up			Other		Total Votes	Diff (US)	PUSV	EV
2020	69%	Donald Trump* (R)	897,672	53.1%	Joe Biden (D)	759,061	44.9%	34,138 [+]	2.0%	1,690,871	6	1.07%	6
[-] Other candidates in 2020: Jo Jorgensen (Lbt) 19,637 (1.2%);
2016	66%	Donald Trump (R)	800,983	51.1%	Hillary Clinton (D)	653,669	41.7%	111,379 [+]	7.1%	1,566,031	5	1.14%	6
[-] Other candidates in 2016: Gary Johnson (Lbt) 59,186 (3.8%); Evan McMullin (I) 12,366 (0.8%); Jill Stein (Grn) 11,479 (0.7%);
2012	68%	Barack Obama* (D)	822,544	52.0%	Mitt Romney (R)	730,617	46.2%	29,019 [+]	1.8%	1,582,180	-1	1.22%	6
[-] Other candidates in 2012: Gary Johnson (Lbt) 12,926 (0.8%);
2008	68%	Barack Obama (D)	828,940	53.9%	John McCain (R)	682,379	44.4%	25,804 [+]	1.7%	1,537,123	-1	1.17%	7
[-] Other candidates in 2008: Ralph Nader (I) 8,014 (0.5%); Bob Barr (Lbt) 4,590 (0.3%);
2004	68%	George W. Bush* (R)	751,957	49.9%	John Kerry (D)	741,898	49.2%	13,053 [+]	0.9%	1,506,908	-1	1.23%	7
[-] Other candidates in 2004: Ralph Nader (I) 5,973 (0.4%);
2000	60%	Albert Gore, Jr. (D)	638,517	48.5%	George W. Bush (R)	634,373	48.2%	42,673 [+]	3.2%	1,315,563	0	1.25%	7
[-] Other candidates in 2000: Ralph Nader (Grn) 29,374 (2.2%); Pat Buchanan (Ref) 5,731 (0.4%);
1996	58%	Bill Clinton* (D)	620,258	50.3%	Robert Dole (R)	492,644	39.9%	121,173 [+]	9.8%	1,234,075	-1	1.28%	7
[-] Other candidates in 1996: Ross Perot (Ref) 105,159 (8.5%); Ralph Nader (Grn) 6,550 (0.5%); Harry Browne (Lbt) 2,315 (0.2%);
1992	65%	Bill Clinton (D)	586,353	43.3%	George Bush* (R)	504,891	37.3%	263,363 [+]	19.4%	1,354,607	0	1.30%	7
[-] Other candidates in 1992: Ross Perot (I) 253,468 (18.7%);
1988	61%	Michael Dukakis (D)	670,557	54.7%	George Bush (R)	545,355	44.5%	9,702 [+]	0.8%	1,225,614	-9	1.34%	8
[-] Other candidates in 1988: Ron Paul (Lbt) 2,494 (0.2%);
1984	64%	Ronald Reagan* (R)	703,088	53.3%	Walter Mondale (D)	605,620	45.9%	11,097	0.8%	1,319,805	-6	1.42%	8
[-] Other candidates in 1984:
1980	63%	Ronald Reagan (R)	676,026	51.3%	Jimmy Carter* (D)	508,672	38.6%	132,963 [+]	10.1%	1,317,661	1	1.52%	8
[-] Other candidates in 1980: John Anderson (I) 115,633 (8.8%); Edward Clark (Lbt) 13,123 (1.0%);
1976	65%	Gerald Ford* (R)	632,863	49.5%	Jimmy Carter (D)	619,931	48.5%	26,512 [+]	2.1%	1,279,306	1	1.57%	8
[-] Other candidates in 1976: Eugene McCarthy (I) 20,051 (1.6%);
1972	64%	Richard Nixon* (R)	706,207	57.6%	George McGovern (D)	496,206	40.5%	23,531 [+]	1.9%	1,225,944	-3	1.58%	8
[-] Other candidates in 1972: John Schmitz (Amer) 22,056 (1.8%);
1968	69%	Richard Nixon (R)	619,106	53.0%	Hubert Humphrey (D)	476,699	40.8%	72,126 [+]	6.2%	1,167,931	10	1.60%	9
[-] Other candidates in 1968: George Wallace (AIP) 66,422 (5.7%);
1964	70%	Lyndon Johnson* (D)	733,030	61.9%	Barry Goldwater (R)	449,148	37.9%	2,361	0.2%	1,184,539	-1	1.68%	9
[-] Other candidates in 1964:
1960	76%	Richard Nixon (R)	722,381	56.7%	John Kennedy (D)	550,565	43.2%	864	0.1%	1,273,810	7	1.85%	10
[-] Other candidates in 1960:
1956	71%	Dwight Eisenhower* (R)	729,187	59.1%	Adlai Stevenson (D)	501,858	40.7%	3,519	0.3%	1,234,564	2	1.99%	10
[-] Other candidates in 1956:
1952	74%	Dwight Eisenhower (R)	808,906	63.8%	Adlai Stevenson (D)	451,313	35.6%	8,354	0.7%	1,268,573	9	2.05%	10
[-] Other candidates in 1952:
1948	62%	Harry Truman* (D)	522,380	50.3%	Thomas Dewey (R)	494,018	47.6%	21,874 [+]	2.1%	1,038,272	2	2.13%	10
[-] Other candidates in 1948: Henry Wallace (Prog) 12,125 (1.2%); Strom Thurmond (StsRts) 0 (0.0%);
1944	63%	Thomas Dewey (R)	547,267	52.0%	Franklin Roosevelt* (D)	499,876	47.5%	5,456	0.5%	1,052,599	6	2.19%	10
[-] Other candidates in 1944:
1940	74%	Wendell Willkie (R)	632,370	52.0%	Franklin Roosevelt* (D)	578,802	47.6%	4,260	0.4%	1,215,432	7	2.44%	11
[-] Other candidates in 1940:
1936	74%	Franklin Roosevelt* (D)	621,756	54.4%	Alf Landon (R)	487,977	42.7%	33,004 [+]	2.9%	1,142,737	6	2.50%	11
[-] Other candidates in 1936: William Lemke (Union) 29,687 (2.6%); Norman Thomas (Soc) 1,373 (0.1%);
1932	68%	Franklin Roosevelt (D)	598,019	57.7%	Herbert Hoover* (R)	414,433	40.0%	24,135 [+]	2.3%	1,036,587	0	2.61%	11
[-] Other candidates in 1932: Norman Thomas (Soc) 20,367 (2.0%);
1928	69%	Herbert Hoover (R)	623,570	61.8%	Al Smith (D)	379,011	37.6%	6,608 [+]	0.7%	1,009,189	4	2.74%	13
[-] Other candidates in 1928: Norman Thomas (Soc) 2,960 (0.3%);
1924	68%	Calvin Coolidge (R)	537,458	55.0%	Robert LaFollette (Prog)	274,448	28.1%	164,864 [+]	16.9%	976,770	1	3.36%	13
[-] Other candidates in 1924: John Davis (D) 160,382 (16.4%);
1920	63%	Warren Harding (R)	634,674	70.9%	James Cox (D)	227,804	25.5%	32,487 [+]	3.6%	894,965	11	3.34%	13
[-] Other candidates in 1920: Eugene Debs (Soc) 16,981 (1.9%); Parley Christiansen (FL) 10,321 (1.2%); Aaron Watkins (Proh) 4,197 (0.5%);
1916	38%	Charles Evans Hughes (R)	279,331	54.3%	Woodrow Wilson* (D)	220,597	42.9%	14,806 [+]	2.9%	514,734	8	2.78%	13
[-] Other candidates in 1916: Allan Benson (Soc) 10,976 (2.1%); James Hanly (Proh) 3,371 (0.7%);
1912	38%	Woodrow Wilson (D)	185,325	37.6%	William Taft* (R)	161,729	32.9%	145,212 [+]	29.5%	492,266	10	3.27%	13
[-] Other candidates in 1912: Theodore Roosevelt (Prog) 119,805 (24.3%); Eugene Debs (Soc) 16,967 (3.4%); Eugene Chafin (Proh) 8,440 (1.7%);
1908	40%	William Taft (R)	275,209	55.6%	William J. Bryan (D)	200,771	40.6%	18,789 [+]	3.8%	494,769	4	3.32%	13
[-] Other candidates in 1908: Eugene Chafin (Proh) 9,837 (2.0%); Eugene Debs (Soc) 8,287 (1.7%); Thomas Hisgen (I) 404 (0.1%);
1904	40%	Theodore Roosevelt (R)	308,158	63.4%	Alton Parker (D)	149,276	30.7%	28,659 [+]	5.9%	486,093	7	3.59%	13
[-] Other candidates in 1904: Eugene Debs (Soc) 14,849 (3.1%); Silas Swallow (Proh) 11,603 (2.4%); Thomas Watson (Pop) 2,207 (0.5%);
1900	43%	William McKinley* (R)	307,808	58.0%	William J. Bryan (D)	209,265	39.5%	13,282 [+]	2.5%	530,355	6	3.80%	13
[-] Other candidates in 1900: John Woolley (Proh) 9,502 (1.8%); Eugene Debs (Soc) 2,742 (0.5%);

* incumbent PUSV: percent of U.S. vote

2020 President, Iowa

Candidate

Votes

Pct

Joe Biden (D)

759,061

44.9%

Donald Trump* (R)

897,672

53.1%

Jo Jorgensen (Lbt)

19,637

1.2%

Other

14,501

0.9%

TOTAL

1,690,871

Turnout: 69%	Diff (US): 6

2016 President, Iowa

Candidate

Votes

Pct

Hillary Clinton (D)

653,669

41.7%

Donald Trump (R)

800,983

51.1%

Gary Johnson (Lbt)

59,186

3.8%

Jill Stein (Grn)

11,479

0.7%

Evan McMullin (I)

12,366

0.8%

Other

28,348

1.8%

TOTAL

1,566,031

Turnout: 66%	Diff (US): 5

2012 President, Iowa

Candidate

Votes

Pct

Barack Obama* (D)

822,544

52.0%

Mitt Romney (R)

730,617

46.2%

Gary Johnson (Lbt)

12,926

0.8%

Other

16,093

1.0%

TOTAL

1,582,180

Turnout: 68%	Diff (US): -1

2008 President, Iowa

Candidate

Votes

Pct

Barack Obama (D)

828,940

53.9%

John McCain (R)

682,379

44.4%

Ralph Nader (I)

8,014

0.5%

Bob Barr (Lbt)

4,590

0.3%

Other

13,200

0.9%

TOTAL

1,537,123

Turnout: 68%	Diff (US): -1

2004 President, Iowa

Candidate

Votes

Pct

George W. Bush* (R)

751,957

49.9%

John Kerry (D)

741,898

49.2%

Ralph Nader (I)

5,973

0.4%

Other

7,080

0.5%

TOTAL

1,506,908

Turnout: 68%	Diff (US): -1

2000 President, Iowa

Candidate

Votes

Pct

George W. Bush (R)

634,373

48.2%

Albert Gore, Jr. (D)

638,517

48.5%

Ralph Nader (Grn)

29,374

2.2%

Pat Buchanan (Ref)

5,731

0.4%

Other

7,568

0.6%

TOTAL

1,315,563

Turnout: 60%	Diff (US): 0

1996 President, Iowa

Candidate

Votes

Pct

Bill Clinton* (D)

620,258

50.3%

Robert Dole (R)

492,644

39.9%

Ross Perot (Ref)

105,159

8.5%

Ralph Nader (Grn)

6,550

0.5%

Harry Browne (Lbt)

2,315

0.2%

Other

7,149

0.6%

TOTAL

1,234,075

Turnout: 58%	Diff (US): -1

1992 President, Iowa

Candidate

Votes

Pct

Bill Clinton (D)

586,353

43.3%

George Bush* (R)

504,891

37.3%

Ross Perot (I)

253,468

18.7%

Other

9,895

0.7%

TOTAL

1,354,607

Turnout: 65%	Diff (US): 0

1988 President, Iowa

Candidate

Votes

Pct

George Bush (R)

545,355

44.5%

Michael Dukakis (D)

670,557

54.7%

Ron Paul (Lbt)

2,494

0.2%

Other

7,208

0.6%

TOTAL

1,225,614

Turnout: 61%	Diff (US): -9

1984 President, Iowa

Candidate

Votes

Pct

Ronald Reagan* (R)

703,088

53.3%

Walter Mondale (D)

605,620

45.9%

Other

11,097

0.8%

TOTAL

1,319,805

Turnout: 64%	Diff (US): -6

1980 President, Iowa

Candidate

Votes

Pct

Ronald Reagan (R)

676,026

51.3%

Jimmy Carter* (D)

508,672

38.6%

John Anderson (I)

115,633

8.8%

Edward Clark (Lbt)

13,123

1.0%

Other

4,207

0.3%

TOTAL

1,317,661

Turnout: 63%	Diff (US): 1

1976 President, Iowa

Candidate

Votes

Pct

Jimmy Carter (D)

619,931

48.5%

Gerald Ford* (R)

632,863

49.5%

Eugene McCarthy (I)

20,051

1.6%

Other

6,461

0.5%

TOTAL

1,279,306

Turnout: 65%	Diff (US): 1

1972 President, Iowa

Candidate

Votes

Pct

Richard Nixon* (R)

706,207

57.6%

George McGovern (D)

496,206

40.5%

John Schmitz (Amer)

22,056

1.8%

Other

1,475

0.1%

TOTAL

1,225,944

Turnout: 64%	Diff (US): -3

1968 President, Iowa

Candidate

Votes

Pct

Richard Nixon (R)

619,106

53.0%

Hubert Humphrey (D)

476,699

40.8%

George Wallace (AIP)

66,422

5.7%

Other

5,704

0.5%

TOTAL

1,167,931

Turnout: 69%	Diff (US): 10

1964 President, Iowa

Candidate

Votes

Pct

Lyndon Johnson* (D)

733,030

61.9%

Barry Goldwater (R)

449,148

37.9%

Other

2,361

0.2%

TOTAL

1,184,539

Turnout: 70%	Diff (US): -1

1960 President, Iowa

Candidate

Votes

Pct

John Kennedy (D)

550,565

43.2%

Richard Nixon (R)

722,381

56.7%

Other

864

0.1%

TOTAL

1,273,810

Turnout: 76%	Diff (US): 7

1956 President, Iowa

Candidate

Votes

Pct

Dwight Eisenhower* (R)

729,187

59.1%

Adlai Stevenson (D)

501,858

40.7%

Other

3,519

0.3%

TOTAL

1,234,564

Turnout: 71%	Diff (US): 2

1952 President, Iowa

Candidate

Votes

Pct

Dwight Eisenhower (R)

808,906

63.8%

Adlai Stevenson (D)

451,313

35.6%

Other

8,354

0.7%

TOTAL

1,268,573

Turnout: 74%	Diff (US): 9

1948 President, Iowa

Candidate

Votes

Pct

Harry Truman* (D)

522,380

50.3%

Thomas Dewey (R)

494,018

47.6%

Henry Wallace (Prog)

12,125

1.2%

Other

9,749

0.9%

TOTAL

1,038,272

Turnout: 62%	Diff (US): 2

1944 President, Iowa

Candidate

Votes

Pct

Franklin Roosevelt* (D)

499,876

47.5%

Thomas Dewey (R)

547,267

52.0%

Other

5,456

0.5%

TOTAL

1,052,599

Turnout: 63%	Diff (US): 6

1940 President, Iowa

Candidate

Votes

Pct

Franklin Roosevelt* (D)

578,802

47.6%

Wendell Willkie (R)

632,370

52.0%

Other

4,260

0.4%

TOTAL

1,215,432

Turnout: 74%	Diff (US): 7

1936 President, Iowa

Candidate

Votes

Pct

Franklin Roosevelt* (D)

621,756

54.4%

Alf Landon (R)

487,977

42.7%

William Lemke (Union)

29,687

2.6%

Norman Thomas (Soc)

1,373

0.1%

Other

1,944

0.2%

TOTAL

1,142,737

Turnout: 74%	Diff (US): 6

1932 President, Iowa

Candidate

Votes

Pct

Franklin Roosevelt (D)

598,019

57.7%

Herbert Hoover* (R)

414,433

40.0%

Norman Thomas (Soc)

20,367

2.0%

Other

3,768

0.4%

TOTAL

1,036,587

Turnout: 68%	Diff (US): 0

1928 President, Iowa

Candidate

Votes

Pct

Herbert Hoover (R)

623,570

61.8%

Al Smith (D)

379,011

37.6%

Norman Thomas (Soc)

2,960

0.3%

Other

3,648

0.4%

TOTAL

1,009,189

Turnout: 69%	Diff (US): 4

1924 President, Iowa

Candidate

Votes

Pct

Calvin Coolidge (R)

537,458

55.0%

John Davis (D)

160,382

16.4%

Robert LaFollette (Prog)

274,448

28.1%

Other

4,482

0.5%

TOTAL

976,770

Turnout: 68%	Diff (US): 1

1920 President, Iowa

Candidate

Votes

Pct

Warren Harding (R)

634,674

70.9%

James Cox (D)

227,804

25.5%

Eugene Debs (Soc)

16,981

1.9%

Parley Christiansen (FL)

10,321

1.2%

Aaron Watkins (Proh)

4,197

0.5%

Other

988

0.1%

TOTAL

894,965

Turnout: 63%	Diff (US): 11

1916 President, Iowa

Candidate

Votes

Pct

Woodrow Wilson* (D)

220,597

42.9%

Charles Evans Hughes (R)

279,331

54.3%

Allan Benson (Soc)

10,976

2.1%

James Hanly (Proh)

3,371

0.7%

Other

459

0.1%

TOTAL

514,734

Turnout: 38%	Diff (US): 8

1912 President, Iowa

Candidate

Votes

Pct

Woodrow Wilson (D)

185,325

37.6%

Theodore Roosevelt (Prog)

119,805

24.3%

William Taft* (R)

161,729

32.9%

Eugene Debs (Soc)

16,967

3.4%

Eugene Chafin (Proh)

8,440

1.7%

TOTAL

492,266

Turnout: 38%	Diff (US): 10

1908 President, Iowa

Candidate

Votes

Pct

William Taft (R)

275,209

55.6%

William J. Bryan (D)

200,771

40.6%

Eugene Debs (Soc)

8,287

1.7%

Eugene Chafin (Proh)

9,837

2.0%

Thomas Hisgen (I)

404

0.1%

Other

261

0.1%

TOTAL

494,769

Turnout: 40%	Diff (US): 4

1904 President, Iowa

Candidate

Votes

Pct

Theodore Roosevelt (R)

308,158

63.4%

Alton Parker (D)

149,276

30.7%

Eugene Debs (Soc)

14,849

3.1%

Silas Swallow (Proh)

11,603

2.4%

Thomas Watson (Pop)

2,207

0.5%

TOTAL

486,093

Turnout: 40%	Diff (US): 7

1900 President, Iowa

Candidate

Votes

Pct

William McKinley* (R)

307,808

58.0%

William J. Bryan (D)

209,265

39.5%

John Woolley (Proh)

9,502

1.8%

Eugene Debs (Soc)

2,742

0.5%

Other

1,038

0.2%

TOTAL

530,355

Turnout: 43%	Diff (US): 6

* incumbent

Historical Statewide Election Results for Iowa

Click on the Year to view county-level data for that election.

Year	Type	Turnout	Winner			Runner-Up			Other		Total Votes
2022	S3	49%	Charles Grassley* (R)	681,501	56.0%	Michael Franken (D)	533,330	43.8%	1,815	0.1%	1,216,646
[-] Other candidates in 2022 included:
2022	G	50%	Kim Reynolds* (R)	709,198	58.0%	Deidre DeJear (D)	482,950	39.5%	29,716 [+]	2.4%	1,221,864
[-] Other candidates in 2022 included: Rick Stewart (Libertarian) 28,998 (2.4%);
2020	S2	68%	Joni Ernst* (R)	864,997	51.7%	Theresa Greenfield (D)	754,859	45.2%	51,972 [+]	3.1%	1,671,828
[-] Other candidates in 2020 included: Rick Stewart (Libertarian) 36,961 (2.2%); Suzanne Herzog (I) 13,800 (0.8%);

2018	G	55%	Kim Reynolds* (R)	667,275	50.3%	Fred Hubbell (D)	630,986	47.5%	29,377 [+]	2.2%	1,327,638
[-] Other candidates in 2018 included: Jake Porter (Libertarian) 21,426 (1.6%); Gary Siegwarth (Clean Water) 7,463 (0.6%);
2016	S3	65%	Charles Grassley* (R)	926,007	60.1%	Patty Judge (D)	549,460	35.7%	65,569 [+]	4.3%	1,541,036
[-] Other candidates in 2016 included: Charles Aldrich (Libertarian) 41,794 (2.7%); Jim Hennager (New Independent) 17,649 (1.1%); Michael Luick-Thrams (I) 4,441 (0.3%);
2014	G	48%	Terry Branstad* (R)	667,325	59.0%	Jack Hatch (D)	421,625	37.3%	42,308 [+]	3.7%	1,131,258
[-] Other candidates in 2014 included: Lee Hieb (Libertarian) 20,356 (1.8%); Jim Hennager (New Independent) 10,602 (0.9%); Jonathan Narcisse (Iowa) 10,256 (0.9%);
2014	S2	48%	Joni Ernst (R)	588,575	52.1%	Bruce Braley (D)	494,370	43.8%	46,755 [+]	4.1%	1,129,700
[-] Other candidates in 2014 included: Rick Stewart (I) 26,815 (2.4%); Douglas Butzier (Libertarian) 8,232 (0.7%); Bob Quast (I) 5,873 (0.5%); Ruth Smith (I) 4,724 (0.4%);
2010	G	48%	Terry Branstad (R)	592,494	52.8%	Chet Culver* (D)	484,798	43.2%	44,721 [+]	4.0%	1,122,013
[-] Other candidates in 2010 included: Jonathan Narcisse (Iowa) 20,859 (1.9%); Eric Cooper (Libertarian) 14,398 (1.3%); Gregory Hughes (I) 3,884 (0.3%); David Rosenfeld (Socialist Workers) 2,757 (0.2%);
2010	S3	48%	Charles Grassley* (R)	718,215	64.4%	Roxanne Conlin (D)	371,686	33.3%	26,162 [+]	2.3%	1,116,063
[-] Other candidates in 2010 included: John Heiderscheit (Libertarian) 25,290 (2.3%);

2008	S2	66%	Tom Harkin* (D)	941,665	62.7%	Christopher Reed (R)	560,006	37.3%	1,247	0.1%	1,502,918
[-] Other candidates in 2008 included:
2006	G	47%	Chet Culver (D)	569,021	54.0%	Jim Nussle (R)	467,425	44.4%	16,809 [+]	1.6%	1,053,255
[-] Other candidates in 2006 included: Wendy Barth (Green) 7,850 (0.7%); Kevin Litten (Libertarian) 5,735 (0.5%); Diana Newberry (Socialist Workers) 1,974 (0.2%);
2004	S3	66%	Charles Grassley* (R)	1,038,175	70.2%	Arthur Small (D)	412,365	27.9%	28,688 [+]	1.9%	1,479,228
[-] Other candidates in 2004 included: Christy Ann Welty (Libertarian) 15,218 (1.0%); Daryl Northrop (Green) 11,121 (0.8%); Edwin Fruit (Socialist Workers) 1,874 (0.1%);
2002	S2	46%	Tom Harkin* (D)	554,278	54.2%	Greg Ganske (R)	447,892	43.8%	20,905 [+]	2.0%	1,023,075
[-] Other candidates in 2002 included: Timothy Harthan (Green) 11,340 (1.1%); Richard Moore (Libertarian) 8,864 (0.9%);
2002	G	46%	Tom Vilsack* (D)	540,449	52.7%	Doug Gross (R)	456,612	44.5%	28,741 [+]	2.8%	1,025,802
[-] Other candidates in 2002 included: Jay Robinson (Green) 14,628 (1.4%); Clyde Cleveland (Libertarian) 13,098 (1.3%);

1998	G	45%	Tom Vilsack (D)	500,231	52.3%	Jim Ross Lightfoot (R)	444,787	46.5%	11,400 [+]	1.2%	956,418
[-] Other candidates in 1998 included: Jim Hennager (Reform) 5,606 (0.6%); Jim Schaefer (Natural Law) 3,144 (0.3%); Mark Kennis (I) 2,006 (0.2%);
1998	S3	44%	Charles Grassley* (R)	648,480	68.4%	David Osterberg (D)	289,049	30.5%	10,378 [+]	1.1%	947,907
[-] Other candidates in 1998 included: Susan Marcus (Natural Law) 7,561 (0.8%); Margaret Trowe (Socialist Workers) 2,542 (0.3%);
1996	S2	58%	Tom Harkin* (D)	634,166	51.8%	Jim Ross Lightfoot (R)	571,807	46.7%	18,081 [+]	1.5%	1,224,054
[-] Other candidates in 1996 included: Sue Atkinson (I) 9,768 (0.8%); Fred Gratzon (Natural Law) 4,248 (0.3%); Joe Sulentic (I) 1,941 (0.2%); Shirley Pena (Socialist Workers) 1,844 (0.2%);
1994	G	47%	Terry Branstad* (R)	566,395	56.8%	Bonnie Campbell (D)	414,453	41.6%	16,400 [+]	1.6%	997,248
[-] Other candidates in 1994 included: Richard Hughes (I) 5,505 (0.6%); Veronica Butler (Natural Law) 3,737 (0.4%); Carl Olson (Libertarian) 2,772 (0.3%); Michael Galati (Socialist Workers) 770 (0.1%);
1992	S3	62%	Charles Grassley* (R)	899,761	69.6%	Jean Lloyd-Jones (D)	351,561	27.2%	41,172 [+]	3.2%	1,292,494
[-] Other candidates in 1992 included: Stuart Zimmerman (Natural Law) 16,403 (1.3%); Sue Atkinson (I) 6,277 (0.5%); Mel Boring (I) 5,508 (0.4%); Roseanne Freeburg (I) 4,999 (0.4%); Carl Olsen (Green) 3,404 (0.3%); Richard Hughes (I) 2,918 (0.2%); Cleve Pulley (Socialist Workers) 1,370 (0.1%);
1990	G	47%	Terry Branstad* (R)	591,852	60.6%	Donald Avenson (D)	379,372	38.9%	5,259 [+]	0.5%	976,483
[-] Other candidates in 1990 included: Nan Bailey (Socialist Workers) 4,263 (0.4%);
1990	S2	48%	Tom Harkin* (D)	529,571	53.8%	Tom Tauke (R)	453,273	46.1%	1,089	0.1%	983,933
[-] Other candidates in 1990 included:

1986	G	45%	Terry Branstad* (R)	472,712	51.9%	Lowell Junkins (D)	436,987	48.0%	924	0.1%	910,623
[-] Other candidates in 1986 included:
1986	S3	44%	Charles Grassley* (R)	588,880	66.0%	John Roehrick (D)	299,406	33.6%	3,476 [+]	0.4%	891,762
[-] Other candidates in 1986 included: John Masters (I) 3,370 (0.4%);
1984	S2	63%	Tom Harkin (D)	716,883	55.5%	Roger Jepsen* (R)	564,381	43.7%	11,436 [+]	0.9%	1,292,700
[-] Other candidates in 1984 included: Gary DeYoung (I) 11,014 (0.9%);
1982	G	50%	Terry Branstad (R)	548,313	52.8%	Roxanne Conlin (D)	483,291	46.5%	6,625 [+]	0.6%	1,038,229
[-] Other candidates in 1982 included: Marcia Farrington (Libertarian) 3,307 (0.3%); Jim Bittner (Socialist) 2,767 (0.3%);
1980	S3	61%	Charles Grassley (R)	683,014	53.5%	John Culver* (D)	581,545	45.5%	12,475 [+]	1.0%	1,277,034
[-] Other candidates in 1980 included: Gary DeYoung (I) 5,858 (0.5%); Robert Hengerer (Libertarian) 4,233 (0.3%); John Henderson (I) 2,336 (0.2%);

1978	G	46%	Robert Ray* (R)	491,713	58.3%	Jerry Fitzgerald (D)	345,519	41.0%	5,958 [+]	0.7%	843,190
[-] Other candidates in 1978 included: John Ball (Libertarian) 3,947 (0.5%); Joseph Grant (Socialist) 1,935 (0.2%);
1978	S2	45%	Roger Jepsen (R)	421,598	51.1%	Dick Clark* (D)	395,066	47.9%	7,990 [+]	1.0%	824,654
[-] Other candidates in 1978 included: Gerald Baker (I) 4,223 (0.5%); Ben Olson (Libertarian) 3,689 (0.4%);
1974	G	51%	Robert Ray* (R)	534,518	58.1%	James Schaben (D)	377,553	41.0%	8,387 [+]	0.9%	920,458
[-] Other candidates in 1974 included: Ralph Scott (American) 8,323 (0.9%);
1974	S3	49%	John Culver (D)	462,947	52.0%	David Stanley (R)	420,546	47.3%	6,068 [+]	0.7%	889,561
[-] Other candidates in 1974 included: Lorin Oxley (American) 6,028 (0.7%);
1972	S2	62%	Dick Clark (D)	662,637	55.1%	Jack Miller* (R)	530,525	44.1%	10,171 [+]	0.8%	1,203,333
[-] Other candidates in 1972 included: William Rocap (American Independent) 8,954 (0.7%); Fred Benton (I) 1,203 (0.1%);
1972	G	63%	Robert Ray* (R)	707,177	58.4%	Paul Franzenburg (D)	487,282	40.3%	15,763 [+]	1.3%	1,210,222
[-] Other candidates in 1972 included: Robert Dilley (American Independent) 15,715 (1.3%);
1970	G	45%	Robert Ray* (R)	403,394	51.0%	Robert Fulton (D)	368,911	46.6%	18,936 [+]	2.4%	791,241
[-] Other candidates in 1970 included: Robert Dilley (American Independent) 18,933 (2.4%);

1968	S3	67%	Harold Hughes (D)	574,884	50.2%	David Stanley (R)	568,469	49.7%	733 [+]	0.1%	1,144,086
[-] Other candidates in 1968 included: Verne Higens (Prohibition) 727 (0.1%);
1968	G	67%	Robert Ray (R)	614,328	54.1%	Paul Franzenburg (D)	521,216	45.9%	945 [+]	0.1%	1,136,489
[-] Other candidates in 1968 included: Harry Miller (Prohibition) 938 (0.1%);
1966	S2	51%	Jack Miller* (R)	522,339	60.9%	E.B. Smith (D)	324,114	37.8%	11,043 [+]	1.3%	857,496
[-] Other candidates in 1966 included: Robert Dilley (American Constitution) 3,826 (0.4%); Charles Day (Peace Independent) 3,050 (0.4%); Herbert Hoover (Independent American) 2,085 (0.2%); Verne Higens (Prohibition) 2,081 (0.2%);
1966	G	53%	Harold Hughes* (D)	494,259	55.3%	William Murray (R)	394,518	44.2%	4,398 [+]	0.5%	893,175
[-] Other candidates in 1966 included: David Quiner (American Constitution) 3,680 (0.4%); Charles Sloca (Independent American) 715 (0.1%);
1964	G	69%	Harold Hughes* (D)	794,610	68.0%	Evan Hultman (R)	365,131	31.3%	7,993 [+]	0.7%	1,167,734
[-] Other candidates in 1964 included: Robert Dilley (Conservative) 7,985 (0.7%);
1962	S3	48%	Bourke Hickenlooper* (R)	431,364	53.4%	E.B. Smith (D)	376,602	46.6%	6	0.0%	807,972
[-] Other candidates in 1962 included:
1962	G	49%	Harold Hughes (D)	430,899	52.6%	Norman Erbe* (R)	388,955	47.4%	0	0.0%	819,854
[-] Other candidates in 1962 included:
1960	G	74%	Norman Erbe (R)	645,026	52.1%	Edward McManus (D)	592,063	47.9%	0	0.0%	1,237,089
[-] Other candidates in 1960 included:
1960	S2	74%	Jack Miller (R)	642,463	51.9%	Herschel Loveless (D)	595,119	48.1%	0	0.0%	1,237,582
[-] Other candidates in 1960 included:

1958	G	49%	Herschel Loveless* (D)	465,024	54.1%	William Murray (R)	394,071	45.9%	0	0.0%	859,095
[-] Other candidates in 1958 included:
1956	S3	68%	Bourke Hickenlooper* (R)	635,499	53.9%	R.M. Evans (D)	543,156	46.1%	0	0.0%	1,178,655
[-] Other candidates in 1956 included:
1956	G	69%	Herschel Loveless (D)	616,852	51.2%	Leo Hoegh* (R)	587,383	48.8%	0	0.0%	1,204,235
[-] Other candidates in 1956 included:
1954	S2	49%	Thomas Martin (R)	442,409	52.2%	Guy Gillette* (D)	402,712	47.5%	2,234 [+]	0.3%	847,355
[-] Other candidates in 1954 included: Ernest Seemann (Republicson) 2,234 (0.3%);
1954	G	49%	Leo Hoegh (R)	435,944	51.4%	Clyde Herring (D)	410,255	48.3%	2,393 [+]	0.3%	848,592
[-] Other candidates in 1954 included: Howard Tyler (Republicsons) 2,393 (0.3%);
1952	G	72%	William Beardsley* (R)	638,388	51.9%	Herschel Loveless (D)	587,671	47.8%	3,986 [+]	0.3%	1,230,045
[-] Other candidates in 1952 included: Everett Kellum (Prohibition) 2,775 (0.2%); Ernest Seemann (Republican Vigilantes) 1,202 (0.1%);
1950	G	51%	William Beardsley* (R)	506,642	59.1%	Lester Gillette (D)	347,176	40.5%	3,395 [+]	0.4%	857,213
[-] Other candidates in 1950 included: Raymond Picken (Prohibition) 2,805 (0.3%); Howard Tyler (States Rights) 590 (0.1%);
1950	S3	51%	Bourke Hickenlooper* (R)	470,613	54.8%	Albert Loveland (D)	383,766	44.7%	4,144 [+]	0.5%	858,523
[-] Other candidates in 1950 included: Everett Kellum (Prohibition) 3,273 (0.4%); Ernest Seemann (States Rights Democrat) 571 (0.1%); Leslie Ludwig (Socialist Labor) 300 (0.0%);

1948	G	59%	William Beardsley (R)	553,900	55.7%	Carroll Switzer (D)	434,432	43.7%	6,501 [+]	0.7%	994,833
[-] Other candidates in 1948 included: C.E. Bierderman (Progressive) 3,570 (0.4%); Marvin Galbreath (Prohibition) 2,458 (0.2%); William Leonard (Socialist) 471 (0.0%);
1948	S2	59%	Guy Gillette (D)	578,226	57.8%	George Wilson* (R)	415,778	41.6%	6,408 [+]	0.6%	1,000,412
[-] Other candidates in 1948 included: Seymour Pitcher (Progressive) 3,387 (0.3%); Everett Kellum (Prohibition) 2,580 (0.3%); Hugo Bockewitz (Socialist) 441 (0.0%);
1946	G	38%	Robert Blue* (R)	362,592	57.4%	Frank Miles (D)	266,190	42.1%	2,911 [+]	0.5%	631,693
[-] Other candidates in 1946 included: E.P. Gabriel (Prohibition) 2,899 (0.5%);
1944	G	60%	Robert Blue (R)	561,827	56.0%	Richard Mitchell (D)	437,684	43.6%	3,752 [+]	0.4%	1,003,263
[-] Other candidates in 1944 included: Glen Williamson (Prohibition) 2,815 (0.3%); Hugo Bockewitz (Socialist) 832 (0.1%);
1944	S3	62%	Bourke Hickenlooper (R)	523,963	51.3%	Guy Gillette* (D)	494,229	48.4%	3,495 [+]	0.3%	1,021,687
[-] Other candidates in 1944 included: W.S. Bowden (Prohibition) 2,751 (0.3%); C.W. Drescher (Socialist) 744 (0.1%);
1942	G	42%	Bourke Hickenlooper (R)	438,547	62.7%	Nelson Kraschel (D)	258,310	37.0%	2,073 [+]	0.3%	698,930
[-] Other candidates in 1942 included: Ward Hall (Prohibition) 1,483 (0.2%); F.M. Briggs (Progressive New Dealer) 590 (0.1%);
1942	S2	43%	George Wilson (R)	410,383	58.0%	Clyde Herring* (D)	295,194	41.7%	2,282 [+]	0.3%	707,859
[-] Other candidates in 1942 included: M.M. Heptonstall (Prohibition) 1,461 (0.2%); Ernest Seemann (Progressive New Dealer) 821 (0.1%);
1940	G	72%	George Wilson* (R)	620,480	52.7%	John Valentine (D)	553,941	47.0%	2,960 [+]	0.3%	1,177,381
[-] Other candidates in 1940 included: M.M. Heptonstall (Prohibition) 1,289 (0.1%); Charles Speck (Communist) 1,230 (0.1%);

1938	S3	54%	Guy Gillette* (D)	413,788	49.7%	Lester Dickinson (R)	410,983	49.4%	7,068 [+]	0.8%	831,839
[-] Other candidates in 1938 included: George Buresh (Farmer Labor) 4,723 (0.6%); Raymond Hanke (Progressive) 1,525 (0.2%); G.W. Bauseman (Prohibition) 820 (0.1%);
1938	G	55%	George Wilson (R)	447,061	52.7%	Nelson Kraschel* (D)	387,779	45.7%	13,473 [+]	1.6%	848,313
[-] Other candidates in 1938 included: Wallace Short (Farmer Labor) 10,186 (1.2%); John Wirds (Progressive) 2,097 (0.2%); Alvin Mitchell (Prohibition) 1,108 (0.1%);
1936	S3	67%	Guy Gillette (D)	536,075	51.9%	Berry Halden (R)	478,521	46.3%	18,147 [+]	1.8%	1,032,743
[-] Other candidates in 1936 included: Ernest Quick (Farmer Labor) 16,179 (1.6%); Tom Johnson (Socialist) 1,008 (0.1%); A.U. Coates (Prohibition) 960 (0.1%);
1936	G	70%	Nelson Kraschel (D)	524,178	48.6%	George Wilson (R)	521,747	48.3%	33,567 [+]	3.1%	1,079,492
[-] Other candidates in 1936 included: Wallace Short (Farmer Labor) 31,438 (2.9%); Ted Fitch (Prohibition) 1,159 (0.1%); J.P. Russell (Socialist) 970 (0.1%);
1936	S2	70%	Clyde Herring (D)	539,555	50.3%	Lester Dickinson* (R)	503,635	47.0%	28,526 [+]	2.7%	1,071,716
[-] Other candidates in 1936 included: George Buresh (Farmer Labor) 25,567 (2.4%); John Hammond (Prohibition) 1,726 (0.2%); Laetitia Conrad (Socialist) 1,233 (0.1%);

*: incumbent +: ran on additional party lines Type: G: Governor; S1,S2,S3: Senate Class 1, 2 or 3
italics: special election

Other Statewide Election Results for Iowa

Year	Type	Turnout	Winner			Runner-Up			Other		Total Votes

2022	AG	49%	Brenna Bird (R)	611,432	50.8%	Tom Miller* (D)	590,890	49.1%	801	0.1%	1,203,123
[-] Other candidates in 2022:
2022	AGR	49%	Mike Naig* (R)	730,285	61.1%	John Norwood (D)	463,652	38.8%	770	0.1%	1,194,707
[-] Other candidates in 2022:
2022	AUD	49%	Rob Sand* (D)	600,719	50.1%	Todd Halbur (R)	597,826	49.8%	826	0.1%	1,199,371
[-] Other candidates in 2022:
2022	LG	0%	Adam Gregg* (R)	0	0.0%				0	0.0%	0
[-] Other candidates in 2022: Marco Battaglia (Lbt) 0 (?%);
2022	SOS	49%	Paul Pate* (R)	723,250	60.0%	Joel Miller (D)	480,474	39.9%	708	0.1%	1,204,432
[-] Other candidates in 2022:
2022	TRE	49%	Roby Smith (R)	614,943	51.3%	Michael Fitzgerald* (D)	584,021	48.7%	667	0.1%	1,199,631
[-] Other candidates in 2022:

2018	AG	48%	Tom Miller* (D)	880,531	76.5%	Marco Battaglia (Lbt)	262,131	22.8%	8,237	0.7%	1,150,899
[-] Other candidates in 2018:
2018	AGR	54%	Mike Naig* (R)	651,552	50.4%	Tim Gannon (D)	602,916	46.6%	39,562 [+]	3.1%	1,294,030
[-] Other candidates in 2018: Rick Stewart (Lbt) 38,965 (3.0%);
2018	AUD	54%	Rob Sand (D)	660,169	51.0%	Mary Mosiman* (R)	601,320	46.4%	33,879 [+]	2.6%	1,295,368
[-] Other candidates in 2018: Fred Perryman (Lbt) 33,421 (2.6%);
2018	LG	0%	Adam Gregg* (R)	0	0.0%				0	0.0%	0
[-] Other candidates in 2018: Lynne Gentry (Lbt) 0 (?%); Natalia Blaskovich (I) 0 (?%);
2018	SOS	54%	Paul Pate* (R)	685,780	52.7%	Deidre DeJear (D)	583,774	44.9%	31,363 [+]	2.4%	1,300,917
[-] Other candidates in 2018: Jules Ofenbakh (Lbt) 30,881 (2.4%);
2018	TRE	54%	Michael Fitzgerald* (D)	710,426	54.8%	Jeremy Davis (R)	553,691	42.7%	31,733 [+]	2.4%	1,295,850
[-] Other candidates in 2018: Tim Hird (Lbt) 31,733 (2.4%);

2014	AG	47%	Tom Miller* (D)	616,711	56.1%	Adam Gregg (R)	481,046	43.8%	1,249	0.1%	1,099,006
[-] Other candidates in 2014:
2014	AGR	46%	Bill Northey* (R)	675,781	62.2%	Sherrie Taha (D)	370,209	34.1%	40,240 [+]	3.7%	1,086,230
[-] Other candidates in 2014: Levi Benning (I) 39,349 (3.6%);
2014	AUD	45%	Mary Mosiman* (R)	604,103	56.9%	Jonathan Neiderbach (D)	456,525	43.0%	1,477	0.1%	1,062,105
[-] Other candidates in 2014:
2014	LG	0%	Kim Reynolds* (R)	0	0.0%				0	0.0%	0
[-] Other candidates in 2014: Tim Watson (Lbt) 0 (?%); Mary Krieg (I) 0 (?%); Michael Richards (I) 0 (?%);
2014	SOS	46%	Paul Pate (R)	529,275	48.5%	Brad Anderson (D)	509,202	46.6%	53,603 [+]	4.9%	1,092,080
[-] Other candidates in 2014: Jake Porter (Lbt) 32,889 (3.0%); Spencer Highland (I) 19,945 (1.8%);
2014	TRE	46%	Michael Fitzgerald* (D)	576,942	52.9%	Sam Clovis (R)	476,633	43.7%	37,615 [+]	3.4%	1,091,190
[-] Other candidates in 2014: Keith Laube (Lbt) 36,945 (3.4%);

2010	AG	47%	Tom Miller* (D)	607,779	55.5%	Brenna Findley (R)	486,057	44.4%	797	0.1%	1,094,633
[-] Other candidates in 2010:
2010	AGR	46%	Bill Northey* (R)	674,572	62.8%	Francis Thicke (D)	398,428	37.1%	849	0.1%	1,073,849
[-] Other candidates in 2010:
2010	AUD	46%	David Vaudt* (R)	597,721	56.4%	Jon Murphy (D)	460,493	43.5%	924	0.1%	1,059,138
[-] Other candidates in 2010:
2010	LG	0%	Kim Reynolds (R)	0	0.0%				0	0.0%	0
[-] Other candidates in 2010: Rick Marlar (I) 0 (?%); Nick Weltha (Lbt) 0 (?%); Robin Prior-Calef (I) 0 (?%); Helen Meyers (SW) 0 (?%);
2010	SOS	47%	Matt Schultz (R)	537,758	49.8%	Michael Mauro* (D)	508,121	47.0%	34,402 [+]	3.2%	1,080,281
[-] Other candidates in 2010: Jake Porter (Lbt) 33,854 (3.1%);
2010	TRE	46%	Michael Fitzgerald* (D)	567,422	52.9%	David Jamison (R)	504,605	47.0%	795	0.1%	1,072,822
[-] Other candidates in 2010:

2006	AG	34%	Tom Miller* (D)	748,181	99.2%				5,663	0.8%	753,844
[-] Other candidates in 2006:
2006	AGR	45%	Bill Northey (R)	523,539	51.3%	Denise O'Brien (D)	495,873	48.6%	608	0.1%	1,020,020
[-] Other candidates in 2006:
2006	AUD	30%	David Vaudt* (R)	669,434	98.8%				7,916	1.2%	677,350
[-] Other candidates in 2006:
2006	LG	0%	Patty Judge (D)	0	0.0%				0	0.0%	0
[-] Other candidates in 2006: Richard Johnson (Grn) 0 (?%); Mark Nelson (Lbt) 0 (?%); Kevin Dwire (SW) 0 (?%);
2006	SOS	45%	Michael Mauro (D)	541,234	53.6%	Mary Ann Hanusa (R)	467,561	46.3%	1,157	0.1%	1,009,952
[-] Other candidates in 2006:
2006	TRE	33%	Michael Fitzgerald* (D)	737,198	99.2%				5,666	0.8%	742,864
[-] Other candidates in 2006:

2002	AG	45%	Tom Miller* (D)	612,167	61.6%	Dave Millage (R)	364,480	36.7%	17,016 [+]	1.7%	993,663
[-] Other candidates in 2002: Edward Noyes (Lbt) 16,607 (1.7%);
2002	AGR	44%	Patty Judge* (D)	490,561	50.0%	John Askew (R)	446,136	45.5%	44,750 [+]	4.6%	981,447
[-] Other candidates in 2002: Brian Depew (Grn) 21,416 (2.2%); Ronald Tigner (I) 11,776 (1.2%); Fritz Groszkruger (Lbt) 11,211 (1.1%);
2002	AUD	43%	David Vaudt (R)	464,469	48.6%	Patrick Deluhery (D)	442,040	46.2%	49,646 [+]	5.2%	956,155
[-] Other candidates in 2002: Christy Ann Welty (Lbt) 49,206 (5.1%);
2002	LG	0%	Sally Pederson* (D)	0	0.0%				0	0.0%	0
[-] Other candidates in 2002: Holly Hart (Grn) 0 (?%); Richard Campagna (Lbt) 0 (?%);
2002	SOS	45%	Chet Culver* (D)	526,600	53.5%	Mike Hartwig (R)	420,290	42.7%	38,151 [+]	3.9%	985,041
[-] Other candidates in 2002: Sylvia Olson (Lbt) 21,434 (2.2%); Don Arenz (Grn) 16,366 (1.7%);
2002	TRE	44%	Michael Fitzgerald* (D)	534,714	54.8%	Matt Whitaker (R)	421,574	43.2%	20,031 [+]	2.1%	976,319
[-] Other candidates in 2002: Tim Hird (Lbt) 19,687 (2.0%);

1998	AG	43%	Tom Miller* (D)	603,523	65.4%	Mark Schwickerath (R)	298,528	32.4%	20,314 [+]	2.2%	922,365
[-] Other candidates in 1998: Nancy Watkins (NtL) 20,104 (2.2%);
1998	AGR	42%	Patty Judge (D)	451,715	50.0%	Dan Brown (R)	424,940	47.1%	25,901 [+]	2.9%	902,556
[-] Other candidates in 1998: Ronald Tigner (I) 10,098 (1.1%); Edward Peak (Ref) 7,767 (0.9%); Samuel James (NtL) 7,734 (0.9%);
1998	AUD	32%	Richard Johnson* (R)	588,079	85.7%	Ronn Young (Ref)	56,635	8.3%	41,589 [+]	6.1%	686,303
[-] Other candidates in 1998: William Graff (NtL) 40,537 (5.9%);
1998	LG	0%	Sally Pederson (D)	0	0.0%				0	0.0%	0
[-] Other candidates in 1998: Sue Atkinson (Ref) 0 (?%); Lynn Waters (NtL) 0 (?%); Lois Kennis (I) 0 (?%);
1998	SOS	43%	Chet Culver (D)	457,161	49.9%	John Gilliland (R)	429,899	46.9%	28,951 [+]	3.2%	916,011
[-] Other candidates in 1998: Sheryl Blue (Ref) 19,094 (2.1%); Daniel Swanson (NtL) 9,580 (1.0%);
1998	TRE	42%	Michael Fitzgerald* (D)	500,853	55.4%	Joan Bolin (R)	390,054	43.1%	13,352 [+]	1.5%	904,259
[-] Other candidates in 1998: Michael Spivak (NtL) 13,135 (1.5%);

1994	AG	45%	Tom Miller (D)	509,045	53.3%	Joseph Gunderson (R)	431,997	45.2%	13,781 [+]	1.4%	954,823
[-] Other candidates in 1994: Jay Marcus (NtL) 13,477 (1.4%);
1994	AGR	44%	Dale Cochran* (D)	491,342	52.6%	Tom Cory (R)	399,693	42.8%	42,467 [+]	4.5%	933,502
[-] Other candidates in 1994: Sue Atkinson (I) 21,413 (2.3%); Jim Schaefer (NtL) 12,916 (1.4%);
1994	AUD	43%	Richard Johnson* (R)	541,932	59.5%	Dan Gray (D)	367,722	40.4%	495	0.1%	910,149
[-] Other candidates in 1994:
1994	LG	0%	Joy Corning* (R)	0	0.0%				0	0.0%	0
[-] Other candidates in 1994: Monica Davis (I) 0 (?%); Robert Stowe (NtL) 0 (?%); Brenda Carey (Lbt) 0 (?%); Shirley Pena (SW) 0 (?%);
1994	SOS	44%	Paul Pate (R)	473,371	51.7%	Anne Pedersen (D)	425,626	46.5%	16,165 [+]	1.8%	915,162
[-] Other candidates in 1994: Steven Druker (NtL) 15,809 (1.7%);
1994	TRE	44%	Michael Fitzgerald* (D)	496,098	53.6%	Jay Irwin (R)	404,722	43.7%	25,338 [+]	2.7%	926,158
[-] Other candidates in 1994: Elizabeth Koehler (NtL) 25,098 (2.7%);

1990	AG	44%	Bonnie Campbell (D)	476,477	52.1%	Ed Kelly (R)	437,644	47.8%	736	0.1%	914,857
[-] Other candidates in 1990:
1990	AGR	44%	Dale Cochran* (D)	510,082	57.0%	Varel Bailey (R)	369,084	41.2%	16,346 [+]	1.8%	895,512
[-] Other candidates in 1990: Richard Bychowski (I) 16,138 (1.8%);
1990	AUD	43%	Richard Johnson* (R)	448,898	50.4%	Beverly Dickerson (D)	440,798	49.5%	268	0.0%	889,964
[-] Other candidates in 1990:
1990	LG	0%	Joy Corning (R)	0	0.0%				0	0.0%	0
[-] Other candidates in 1990: Sandra Nelson (SW) 0 (?%);
1990	SOS	44%	Elaine Baxter* (D)	471,888	52.3%	Beverly Anderson (R)	430,162	47.7%	372	0.0%	902,422
[-] Other candidates in 1990:
1990	TRE	43%	Michael Fitzgerald* (D)	525,874	58.8%	Burtwin Day (R)	352,893	39.4%	15,947 [+]	1.8%	894,714
[-] Other candidates in 1990: Derrick Grimmer (I) 15,745 (1.8%);

1986	AG	41%	Tom Miller* (D)	545,653	64.4%	James Davis (R)	295,203	34.9%	5,979 [+]	0.7%	846,835
[-] Other candidates in 1986: Eddie Collins (I) 5,922 (0.7%);
1986	AGR	41%	Dale Cochran (D)	440,409	53.0%	Thatcher Johnson (R)	377,233	45.4%	13,188 [+]	1.6%	830,830
[-] Other candidates in 1986: Delbert Banowetz (I) 13,072 (1.6%);
1986	AUD	40%	Richard Johnson* (R)	419,088	50.7%	Beverly Dickerson (D)	406,747	49.2%	73	0.0%	825,908
[-] Other candidates in 1986:
1986	LG	41%	Jo Ann Zimmerman (D)	436,999	51.6%	Joan Lipsky (R)	394,109	46.5%	16,507 [+]	1.9%	847,615
[-] Other candidates in 1986: Dean Arbuckle (I) 16,360 (1.9%);
1986	SOS	40%	Elaine Baxter (D)	420,487	51.0%	Dawn Roberts (R)	403,676	49.0%	132	0.0%	824,295
[-] Other candidates in 1986:
1986	TRE	41%	Michael Fitzgerald* (D)	480,636	57.8%	Jack Nystrom (R)	350,549	42.2%	68	0.0%	831,253
[-] Other candidates in 1986:

1982	AG	47%	Tom Miller* (D)	577,277	59.4%	Walter Conlon (R)	388,284	40.0%	5,532 [+]	0.6%	971,093
[-] Other candidates in 1982: Dean Hayne (Lbt) 2,811 (0.3%); Brent Vanderlinden (Soc) 2,692 (0.3%);
1982	AGR	47%	Robert Lounsberry* (R)	539,067	55.4%	Jim Riordan (D)	428,154	44.0%	6,301 [+]	0.6%	973,522
[-] Other candidates in 1982: Ben Olson (Lbt) 6,301 (0.6%); James Dubert (Soc) 2,507 (0.3%);
1982	AUD	47%	Richard Johnson* (R)	551,559	56.0%	Tom Slockett (D)	429,938	43.6%	3,853 [+]	0.4%	985,350
[-] Other candidates in 1982: Anne Koloc (Soc) 3,838 (0.4%);
1982	LG	47%	Bob Anderson (D)	513,193	52.1%	Lawrence Pope (R)	464,437	47.2%	7,331 [+]	0.7%	984,961
[-] Other candidates in 1982: Dean Miller (Lbt) 4,507 (0.5%); Steve Marsden (Soc) 2,763 (0.3%);
1982	SOS	47%	Mary Jane O'Dell* (R)	547,390	55.9%	Al Sorenson (D)	426,547	43.5%	6,119 [+]	0.6%	980,056
[-] Other candidates in 1982: Sylvia Olson (Lbt) 3,584 (0.4%); Joseph Henry (Soc) 2,523 (0.3%);
1982	TRE	46%	Michael Fitzgerald (D)	494,705	51.5%	Maurice Baringer* (R)	464,036	48.3%	2,774 [+]	0.3%	961,515
[-] Other candidates in 1982: Don Doumakes (Soc) 2,758 (0.3%);

1978	AG	43%	Tom Miller (D)	442,895	55.6%	Richard Turner* (R)	351,251	44.1%	2,560 [+]	0.3%	796,706
[-] Other candidates in 1978: Steve Wilson (Soc) 2,519 (0.3%);
1978	AGR	42%	Robert Lounsberry* (R)	460,218	59.5%	James Jordan (D)	309,702	40.1%	3,151 [+]	0.4%	773,071
[-] Other candidates in 1978: James Dubert (Soc) 3,120 (0.4%);
1978	AUD	42%	Lloyd Smith* (R)	446,604	58.0%	John Brunow (D)	320,884	41.7%	2,935 [+]	0.4%	770,423
[-] Other candidates in 1978: Thomas Oliver (Soc) 2,920 (0.4%);
1978	LG	41%	Terry Branstad (R)	430,587	57.7%	William Palmer (D)	315,646	42.3%	0	0.0%	746,233
[-] Other candidates in 1978:
1978	SOS	40%	Melvin Synhorst* (R)	401,085	54.3%	Walter Griffin (D)	334,684	45.3%	2,362 [+]	0.3%	738,131
[-] Other candidates in 1978: Leighten Berryhill (Soc) 2,262 (0.3%);
1978	TRE	41%	Maurice Baringer* (R)	419,792	55.5%	Bob Krause (D)	336,163	44.5%	17	0.0%	755,972
[-] Other candidates in 1978:

1974	AG	49%	Richard Turner* (R)	458,196	52.2%	Tom Miller (D)	419,270	47.8%	31	0.0%	877,497
[-] Other candidates in 1974:
1974	AGR	47%	Robert Lounsberry* (R)	454,429	53.4%	Francis York (D)	396,890	46.6%	32	0.0%	851,351
[-] Other candidates in 1974:
1974	AUD	47%	Lloyd Smith* (R)	470,751	55.0%	Harold Forrett (D)	384,439	45.0%	32	0.0%	855,222
[-] Other candidates in 1974:
1974	LG	49%	Arthur Neu* (R)	479,117	54.5%	Charles Miller (D)	393,445	44.7%	7,116 [+]	0.8%	879,678
[-] Other candidates in 1974: Merlin Glade (Amer) 7,078 (0.8%);
1974	SOS	48%	Melvin Synhorst* (R)	473,329	54.9%	Cloyd Robinson (D)	388,200	45.1%	31	0.0%	861,560
[-] Other candidates in 1974:
1974	TRE	47%	Maurice Baringer* (R)	425,702	50.2%	Daniel Fitzgerald (D)	415,034	48.9%	7,988 [+]	0.9%	848,724
[-] Other candidates in 1974: Charles Hartman (Amer) 7,960 (0.9%);

1972	AG	59%	Richard Turner* (R)	623,037	54.4%	James Reynolds (D)	522,324	45.6%	46	0.0%	1,145,407
[-] Other candidates in 1972:
1972	AGR	56%	Robert Lounsberry (R)	579,242	53.4%	Kenneth Owen (D)	506,184	46.6%	13	0.0%	1,085,439
[-] Other candidates in 1972:
1972	AUD	57%	Lloyd Smith* (R)	668,158	61.0%	Harold Forrett (D)	426,582	39.0%	6	0.0%	1,094,746
[-] Other candidates in 1972:
1972	LG	60%	Arthur Neu (R)	605,191	52.3%	William Gannon (D)	551,071	47.7%	0	0.0%	1,156,262
[-] Other candidates in 1972:
1972	SOS	59%	Melvin Synhorst* (R)	659,830	58.1%	Daryl Beall (D)	475,978	41.9%	3	0.0%	1,135,811
[-] Other candidates in 1972:
1972	TRE	58%	Maurice Baringer* (R)	609,488	54.6%	Albert Anderson (D)	506,184	45.4%	1	0.0%	1,115,673
[-] Other candidates in 1972:

1970	AG	42%	Richard Turner* (R)	405,474	54.3%	Ray Walton (D)	341,451	45.7%	5	0.0%	746,930
[-] Other candidates in 1970:
1970	AGR	42%	L.B. Liddy* (R)	395,885	52.6%	Kenneth Owen (D)	357,095	47.4%	4	0.0%	752,984
[-] Other candidates in 1970:
1970	AUD	42%	Lloyd Smith* (R)	422,622	56.6%	Donald Linduski (D)	323,510	43.4%	2	0.0%	746,134
[-] Other candidates in 1970:
1970	LG	43%	Roger Jepsen* (R)	423,491	55.6%	Minnette Doderer (D)	338,722	44.4%	0	0.0%	762,213
[-] Other candidates in 1970:
1970	SOS	42%	Melvin Synhorst* (R)	437,920	58.3%	Sharon Robinson (D)	313,510	41.7%	1	0.0%	751,431
[-] Other candidates in 1970:
1970	TRE	42%	Maurice Baringer* (R)	401,295	54.5%	William Palmer (D)	335,400	45.5%	0	0.0%	736,695
[-] Other candidates in 1970:

1968	AG	63%	Richard Turner* (R)	596,302	55.2%	Don Johnston (D)	482,376	44.6%	2,042 [+]	0.2%	1,080,720
[-] Other candidates in 1968: George Murray (Proh) 2,038 (0.2%);
1968	AGR	64%	L.B. Liddy* (R)	604,065	55.5%	Kenneth Owen (D)	483,396	44.4%	1,158 [+]	0.1%	1,088,619
[-] Other candidates in 1968: Cline Woods (Proh) 1,155 (0.1%);
1968	AUD	63%	Lloyd Smith* (R)	618,400	57.3%	Donald Kelly (D)	458,542	42.5%	1,377 [+]	0.1%	1,078,319
[-] Other candidates in 1968: A.J. Buchholz (Proh) 1,376 (0.1%);
1968	LG	64%	Roger Jepsen (R)	618,929	56.8%	Andrew Frommelt (D)	469,556	43.1%	1,426 [+]	0.1%	1,089,911
[-] Other candidates in 1968: Frank Pearson (Proh) 1,424 (0.1%);
1968	SOS	64%	Melvin Synhorst* (R)	637,860	58.6%	Robert Dodds (D)	449,290	41.3%	1,187 [+]	0.1%	1,088,337
[-] Other candidates in 1968: Margaret Work (Proh) 1,187 (0.1%);
1968	TRE	63%	Maurice Baringer (R)	602,921	56.5%	John Cruise (D)	463,691	43.5%	1	0.0%	1,066,613
[-] Other candidates in 1968:

1966	AG	50%	Richard Turner (R)	428,209	50.4%	Lawrence Scalise* (D)	417,587	49.2%	3,392 [+]	0.4%	849,188
[-] Other candidates in 1966: George Murray (I) 3,392 (0.4%);
1966	AGR	50%	L.B. Liddy (R)	454,823	53.6%	Kenneth Owen* (D)	391,521	46.1%	2,829	0.3%	849,173
[-] Other candidates in 1966:
1966	AUD	50%	Lloyd Smith (R)	442,063	52.6%	Lorne Worthington* (D)	398,577	47.4%	1	0.0%	840,641
[-] Other candidates in 1966:
1966	LG	50%	Robert Fulton* (D)	424,968	49.9%	Max Mills (R)	423,708	49.7%	3,099 [+]	0.4%	851,775
[-] Other candidates in 1966: Grover Walls (Cst) 3,098 (0.4%);
1966	SOS	50%	Melvin Synhorst (R)	471,547	55.5%	Michael Doyle (D)	375,173	44.2%	2,911 [+]	0.3%	849,631
[-] Other candidates in 1966: Robert Fredregill (Cst) 2,910 (0.3%);
1966	TRE	50%	Paul Franzenburg* (D)	427,311	50.7%	Dale Awtry (R)	412,666	49.0%	2,709 [+]	0.3%	842,686
[-] Other candidates in 1966: Alvin Eljason (Cst) 2,709 (0.3%);

1964	AG	65%	Lawrence Scalise (D)	624,122	56.7%	W.N. Bump (R)	474,841	43.1%	2,337 [+]	0.2%	1,101,300
[-] Other candidates in 1964: Gordon Risher (Con) 2,335 (0.2%);
1964	AGR	66%	Kenneth Owen (D)	608,732	55.0%	L.B. Liddy* (R)	497,514	45.0%	1	0.0%	1,106,247
[-] Other candidates in 1964:
1964	AUD	66%	Lorne Worthington (D)	609,392	55.1%	Chet Akers* (R)	493,396	44.7%	2,194 [+]	0.2%	1,104,982
[-] Other candidates in 1964: Alvin Eljason (Cst) 2,192 (0.2%);
1964	LG	67%	Robert Fulton (D)	648,150	57.8%	Bill Mooty* (R)	473,346	42.2%	0	0.0%	1,121,496
[-] Other candidates in 1964:
1964	SOS	66%	Gary Cameron (D)	607,500	54.6%	Melvin Synhorst* (R)	502,577	45.2%	2,362 [+]	0.2%	1,112,439
[-] Other candidates in 1964: Robert Fredregill (Cst) 2,361 (0.2%);
1964	TRE	66%	Paul Franzenburg (D)	606,108	54.7%	Merrill Abrahamson* (R)	502,460	45.3%	4	0.0%	1,108,572
[-] Other candidates in 1964:

1962	AG	46%	Evan Hultman* (R)	428,682	55.9%	Lawrence Scalise (D)	338,088	44.1%	0	0.0%	766,770
[-] Other candidates in 1962:
1962	AGR	46%	L.B. Liddy (R)	418,555	54.0%	Corbin Crawford (D)	356,693	46.0%	0	0.0%	775,248
[-] Other candidates in 1962:
1962	AUD	47%	Chet Akers* (R)	424,373	54.3%	Robert Conner (D)	356,814	45.7%	0	0.0%	781,187
[-] Other candidates in 1962:
1962	LG	47%	Bill Mooty* (R)	403,845	51.4%	Melvin Wolf (D)	381,574	48.6%	0	0.0%	785,419
[-] Other candidates in 1962:
1962	SOS	47%	Melvin Synhorst* (R)	436,965	55.7%	Delma Dever (D)	346,990	44.3%	0	0.0%	783,955
[-] Other candidates in 1962:
1962	TRE	47%	Merrill Abrahamson* (R)	419,507	53.3%	Roy Gillette (D)	367,982	46.7%	0	0.0%	787,489
[-] Other candidates in 1962:

1960	AG	71%	Evan Hultman (R)	638,703	53.7%	Don Wilson (D)	551,061	46.3%	0	0.0%	1,189,764
[-] Other candidates in 1960:
1960	AGR	72%	Clyde Spry* (R)	645,336	53.7%	Neel Hill (D)	556,076	46.3%	0	0.0%	1,201,412
[-] Other candidates in 1960:
1960	AUD	72%	Chet Akers* (R)	638,727	53.4%	Robert Hutte (R)	557,375	46.6%	0	0.0%	1,196,102
[-] Other candidates in 1960:
1960	LG	72%	Bill Mooty (R)	636,796	53.0%	John Hanson (D)	564,668	47.0%	0	0.0%	1,201,464
[-] Other candidates in 1960:
1960	SOS	72%	Melvin Synhorst* (R)	658,942	54.9%	Kenneth Robinson (D)	541,995	45.1%	0	0.0%	1,200,937
[-] Other candidates in 1960:
1960	TRE	72%	Merrill Abrahamson* (R)	660,565	55.1%	Conrad Lawlor (D)	537,242	44.9%	0	0.0%	1,197,807
[-] Other candidates in 1960:

*: incumbent +: ran on additional party lines
Type: AG: Attorney General; AGR: Commissioner of Agriculture; AUD: Auditor; LG: Lt. Governor; SOS: Secretary of State; TRE: Treasurer
italics: special election

Voter Registration Data for Iowa

Click on the Year to display registration data in the map

Year	Total	Republican		Democrat		Other		R/D Edge	R/D Edge %	VAPOP %
2023	1,490,461	585,418	39.3%	468,773	31.5%	436,270	29.3%	Rep +116,645	Rep +7.8%	61%
2022	1,878,691	687,710	36.6%	598,205	31.8%	592,776	31.6%	Rep +89,505	Rep +4.8%	76%
2020	2,095,580	719,591	34.3%	699,001	33.4%	676,988	32.3%	Rep +20,590	Rep +1.0%	85%
2018	2,013,108	649,944	32.3%	627,430	31.2%	735,734	36.5%	Rep +22,514	Rep +1.1%	83%
2016	1,996,183	662,167	33.2%	629,081	31.5%	704,935	35.3%	Rep +33,086	Rep +1.7%	83%
2014	1,937,024	620,083	32.0%	602,048	31.1%	714,893	36.9%	Rep +18,035	Rep +0.9%	82%
2012	1,936,801	626,508	32.3%	621,401	32.1%	688,892	35.6%	Rep +5,107	Rep +0.3%	83%
2010	1,984,993	618,614	31.2%	663,215	33.4%	703,164	35.4%	Dem +44,601	Dem +2.2%	86%
2008	2,003,901	592,397	29.6%	698,839	34.9%	712,665	35.6%	Dem +106,442	Dem +5.3%	87%
2006	1,931,912	589,477	30.5%	607,672	31.5%	734,763	38.0%	Dem +18,195	Dem +0.9%	85%
2004	1,964,730	610,336	31.1%	605,934	30.8%	748,460	38.1%	Rep +4,402	Rep +0.2%	88%
2002	1,809,824	582,303	32.2%	529,605	29.3%	697,916	38.6%	Rep +52,698	Rep +2.9%	82%
2000	1,840,346	590,209	32.1%	565,561	30.7%	684,576	37.2%	Rep +24,648	Rep +1.3%	84%
1994	1,631,126	586,781	36.0%	581,150	35.6%	463,195	28.4%	Rep +5,631	Rep +0.3%	77%
1986	1,620,538	506,412	31.2%	571,972	35.3%	542,154	33.5%	Dem +65,560	Dem +4.0%	78%

VAPOP% is the estimated percentage of voting age population that is registered.
Registration data may include "inactive" voters. Data for each year pertains to the November elections.

Partisan Legislative Composition for Iowa

Year	U.S. House
Year	Rep	Dem	Other
2022	4	0	0
2020	3	1	0
2018	1	3	0
2016	3	1	0
2014	3	1	0
2012	2	2	0
2010	2	3	0
2008	2	3	0
2006	2	3	0
2004	4	1	0
2002	4	1	0
2000	4	1	0
1998	4	1	0
1996	4	1	0
1994	5	0	0
1992	4	1	0
1990	4	2	0
1988	4	2	0
1986	4	2	0
1984	4	2	0
1982	3	3	0
1980	3	3	0
1978	3	3	0
1976	2	4	0
1974	1	5	0
1972	3	3	0
1970	5	2	0
1968	5	2	0
1966	5	2	0
1964	1	6	0
1962	6	1	0
1960	6	2	0
1958	4	4	0
1956	7	1	0
1954	8	0	0
1952	8	0	0
1950	8	0	0
1948	8	0	0
1946	8	0	0
1944	8	0	0
1942	8	0	0
1940	7	2	0
1938	7	2	0
1936	4	5	0

Year	State Senate
Year	Rep	Dem	Other
2022	34	16	0
2020	32	18	0
2018	32	18	0
2016	29	20	1
2014	24	26	0
2012	24	26	0
2010	24	26	0
2008	18	32	0
2006	20	30	0
2004	25	25	0
2002	29	21	0
2000	30	20	0
1998	30	20	0
1996	29	21	0
1994	23	27	0
1992	24	26	0
1990	22	28	0
1988	20	30	0
1986	20	30	0
1984	21	29	0
1982	22	28	0
1980	29	21	0
1978	28	22	0
1976	24	26	0
1974	24	26	0
1972	28	22	0
1970	38	12	0
1968	44	17	0
1966	29	32	0
1964	25	34	0
1962	38	12	0
1960	35	15	0
1958	33	17	0
1956	40	10	0
1954	44	6	0
1952	46	4	0
1950	41	9	0
1948	43	7	0
1946	44	6	0
1944	45	5	0
1942	45	5	0
1940	45	5	0
1938	38	12	0
1936	22	28	0

Year	State House
Year	Rep	Dem	Other
2022	64	36	0
2020 [1]	59	41	0
2018	53	47	0
2016	59	41	0
2014	57	43	0
2012	53	46	0
2010	60	40	0
2008	43	57	0
2006	46	54	0
2004	51	49	0
2002	54	46	0
2000	56	44	0
1998	56	44	0
1996	54	46	0
1994	64	36	0
1992	51	49	0
1990	47	53	0
1988	39	61	0
1986	42	58	0
1984	40	60	0
1982	40	60	0
1980	58	42	0
1978	57	43	0
1976	41	59	0
1974	39	61	0
1972	57	43	0
1970	63	37	0
1968	86	38	0
1966	89	35	0
1964	23	101	0
1962	78	30	0
1960	78	30	0
1958	58	50	0
1956	71	37	0
1954	90	18	0
1952	105	3	0
1950	93	15	0
1948	79	29	0
1946	98	10	0
1944	91	17	0
1942	98	10	0
1940	87	21	0
1938	89	19	0
1936 [2]	54	54	0

The partisan breakdowns shown are ones which took effect following the general elections in the specified year.

[1] Jon Dunwell won a special election in the 29th district on October 12, 2021, flipping it from Democratic to Republican (60 R, 40 D).
[2] A Republican voted with the Democrats to elect a Democratic Speaker, LaMar Foster. Democrats were thus able to organize and control the House.

Source for state legislature data and notations: Wikipedia