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Winnebago County, IL


Metropolitan Statistical Area: Rockford, IL
Designated Market Area: Rockford, IL
USDA County Type (2015): Manufacturing
American Communities Project County Type (2023): Middle Suburbs

Places in Winnebago County, IL     [Sort places by name]

 

Tracts in Winnebago County, IL

   



Click here to view demographic data for Winnebago County, IL

2022 population: 282,188   ( 13,078 from 2010 , 3,162 from 2020)
Land area: 513.0 square miles
Population density: 550.0 persons per square mile

2022 Census data
White:184,469 65.37% 13.9%
Black:38,84113.76% 9.9%
Indian:5250.19% 6.7%
Asian:8,1392.88% 20.0%
2+ races:7,7342.74% 31.8%
Hispanic:42,48015.05% 32.0%
Total non-White:97,71934.63% 20.5%

2020-2022 ComponentsNumberRate
Births:7,453 13.1
Deaths:7,61113.3
Net Migration: -3,905-6.8
Net Immigration: 8191.4
Change in White population:-29,727 -10.1
Change in Non-White pop.:16,649 5.6



Historical Presidential Election Results for Winnebago County, IL

Recent Trends
VotesΔ MarginSwing %
2020 vs. 2016 R +5,237 D +3,106 D + 2.5%
D +8,343
2020 vs. 2012 R +5,723 R +3,399 R + 3.1%
D +2,324
2020 vs. 2008 R +6,975 R +12,953 R + 10.5%
D -5,978
2016 vs. 2008 R +1,738 R +16,059 R + 13.0%
D -14,321
How to interpret this table


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

YearTurnout WinnerRunner-Up OtherTotal Votes Diff
(St) 		Diff
(US) 		PSV
2020 59% Joe Biden (D) 64,056 50.0% Donald Trump* (R) 60,861 47.5% 3,243 [+] 2.5% 128,160 7 1 2.12%
2016 55% Hillary Clinton (D) 55,713 46.4% Donald Trump (R) 55,624 46.3% 8,718 [+] 7.3% 120,055 8 0 2.15%
2012 54% Barack Obama* (D) 61,732 51.7% Mitt Romney (R) 55,138 46.2% 2,527 [+] 2.1% 119,397 6 -1 2.27%
2008 58% Barack Obama (D) 70,034 55.3% John McCain (R) 53,886 42.5% 2,784 [+] 2.2% 126,704 6 -3 2.29%
2004 57% George W. Bush* (R) 60,782 50.1% John Kerry (D) 59,740 49.2% 903 [+] 0.7% 121,425 6 -1 2.30%
2000 53% George W. Bush (R) 53,816 49.2% Albert Gore, Jr. (D) 51,981 47.6% 3,500 [+] 3.2% 109,297 7 1 2.30%
1996 51% Bill Clinton* (D) 46,264 46.3% Robert Dole (R) 44,479 44.5% 9,167 [+] 9.2% 99,910 8 4 2.32%
1992 59% Bill Clinton (D) 48,298 43.0% George Bush* (R) 42,221 37.6% 21,696 [+] 19.3% 112,215 3 0 2.22%
1988 55% George Bush (R) 55,699 54.8% Michael Dukakis (D) 45,280 44.6% 571 [+] 0.6% 101,550 4 1 2.23%
1984 61% Ronald Reagan* (R) 64,203 58.7% Walter Mondale (D) 44,629 40.8% 619 0.6% 109,451 2 0 2.27%
1980 60% Ronald Reagan (R) 48,825 46.5% Jimmy Carter* (D) 32,384 30.8% 23,880 [+] 22.7% 105,089 -3 -4 2.21%
1976 59% Gerald Ford* (R) 52,736 54.2% Jimmy Carter (D) 42,399 43.5% 2,252 [+] 2.3% 97,387 4 6 2.06%
1972 57% Richard Nixon* (R) 57,682 61.4% George McGovern (D) 35,937 38.2% 394 [+] 0.4% 94,013 2 1 1.99%
1968 62% Richard Nixon (R) 47,646 52.5% Hubert Humphrey (D) 36,702 40.4% 6,391 [+] 7.0% 90,739 5 9 1.96%
1964 65% Lyndon Johnson* (D) 48,834 55.0% Barry Goldwater (R) 39,920 45.0% 0 0.0% 88,754 4 6 1.89%
1960 70% Richard Nixon (R) 49,541 55.2% John Kennedy (D) 40,090 44.7% 110 0.1% 89,741 5 6 1.89%
1956 63% Dwight Eisenhower* (R) 48,332 62.4% Adlai Stevenson (D) 29,063 37.5% 89 0.1% 77,484 3 5 1.76%
1952 69% Dwight Eisenhower (R) 43,468 58.0% Adlai Stevenson (D) 31,409 41.9% 127 0.2% 75,004 3 3 1.67%
1948 59% Thomas Dewey (R) 29,537 51.5% Harry Truman* (D) 27,145 47.4% 631 [+] 1.1% 57,313 2 6 1.44%
1944 66% Thomas Dewey (R) 30,837 52.3% Franklin Roosevelt* (D) 27,831 47.2% 277 0.5% 58,945 4 6 1.46%
1940 73% Wendell Willkie (R) 30,683 51.9% Franklin Roosevelt* (D) 28,061 47.5% 383 0.6% 59,127 3 7 1.40%
1936 73% Franklin Roosevelt* (D) 27,200 50.4% Alf Landon (R) 24,997 46.3% 1,792 [+] 3.3% 53,989 7 10 1.36%
1932 64% Herbert Hoover* (R) 26,632 57.1% Franklin Roosevelt (D) 17,707 38.0% 2,286 [+] 4.9% 46,625 15 18 1.37%
1928 62% Herbert Hoover (R) 33,258 80.4% Al Smith (D) 7,684 18.6% 430 [+] 1.0% 41,372 23 22 1.33%
1924 51% Calvin Coolidge (R) 21,978 71.3% Robert LaFollette (Prog) 6,434 20.9% 2,402 [+] 7.8% 30,814 12 17 1.25%
1920 47% Warren Harding (R) 19,913 79.2% James Cox (D) 3,355 13.3% 1,866 [+] 7.4% 25,134 11 19 1.20%
1916 49% Charles Evans Hughes (R) 14,893 65.0% Woodrow Wilson* (D) 6,198 27.1% 1,806 [+] 7.9% 22,897 12 19 1.04%
1912 33% Theodore Roosevelt (Prog) 7,089 54.1% William Taft* (R) 2,537 19.4% 3,479 [+] 26.5% 13,105 -3 -4 1.14%
1908 37% William Taft (R) 8,919 71.5% William J. Bryan (D) 2,163 17.3% 1,385 [+] 11.1% 12,467 17 20 1.08%
1904 36% Theodore Roosevelt (R) 8,143 74.8% Alton Parker (D) 1,177 10.8% 1,567 [+] 14.4% 10,887 16 18 1.01%
1900 42% William McKinley* (R) 8,103 72.7% William J. Bryan (D) 2,498 22.4% 546 [+] 4.9% 11,147 20 21 0.98%
* incumbent         PSV: percent of state vote



2020 President, Winnebago County, IL
CandidateVotesPct
Joe Biden (D) 64,056 50.0%
Donald Trump* (R) 60,861 47.5%
Jo Jorgensen (Lbt) 1,719 1.3%
Other 1,524 1.2%
TOTAL 128,160
Turnout: 59% Diff (St): 7 Diff (US): 1


2016 President, Winnebago County, IL
CandidateVotesPct
Hillary Clinton (D) 55,713 46.4%
Donald Trump (R) 55,624 46.3%
Gary Johnson (Lbt) 5,064 4.2%
Jill Stein (Grn) 1,703 1.4%
Other 1,951 1.6%
TOTAL 120,055
Turnout: 55% Diff (St): 8 Diff (US): 0


2012 President, Winnebago County, IL
CandidateVotesPct
Barack Obama* (D) 61,732 51.7%
Mitt Romney (R) 55,138 46.2%
Gary Johnson (Lbt) 1,465 1.2%
Other 1,062 0.9%
TOTAL 119,397
Turnout: 54% Diff (St): 6 Diff (US): -1


2008 President, Winnebago County, IL
CandidateVotesPct
Barack Obama (D) 70,034 55.3%
John McCain (R) 53,886 42.5%
Ralph Nader (I) 923 0.7%
Bob Barr (Lbt) 747 0.6%
Other 1,114 0.9%
TOTAL 126,704
Turnout: 58% Diff (St): 6 Diff (US): -3


2004 President, Winnebago County, IL
CandidateVotesPct
George W. Bush* (R) 60,782 50.1%
John Kerry (D) 59,740 49.2%
Other 903 0.7%
TOTAL 121,425
Turnout: 57% Diff (St): 6 Diff (US): -1


2000 President, Winnebago County, IL
CandidateVotesPct
George W. Bush (R) 53,816 49.2%
Albert Gore, Jr. (D) 51,981 47.6%
Ralph Nader (Grn) 2,637 2.4%
Pat Buchanan (Ref) 345 0.3%
Other 518 0.5%
TOTAL 109,297
Turnout: 53% Diff (St): 7 Diff (US): 1


1996 President, Winnebago County, IL
CandidateVotesPct
Bill Clinton* (D) 46,264 46.3%
Robert Dole (R) 44,479 44.5%
Ross Perot (Ref) 8,192 8.2%
Harry Browne (Lbt) 660 0.7%
Other 315 0.3%
TOTAL 99,910
Turnout: 51% Diff (St): 8 Diff (US): 4


1992 President, Winnebago County, IL
CandidateVotesPct
Bill Clinton (D) 48,298 43.0%
George Bush* (R) 42,221 37.6%
Ross Perot (I) 21,227 18.9%
Other 469 0.4%
TOTAL 112,215
Turnout: 59% Diff (St): 3 Diff (US): 0


1988 President, Winnebago County, IL
CandidateVotesPct
George Bush (R) 55,699 54.8%
Michael Dukakis (D) 45,280 44.6%
Ron Paul (Lbt) 268 0.3%
Other 303 0.3%
TOTAL 101,550
Turnout: 55% Diff (St): 4 Diff (US): 1


1984 President, Winnebago County, IL
CandidateVotesPct
Ronald Reagan* (R) 64,203 58.7%
Walter Mondale (D) 44,629 40.8%
Other 619 0.6%
TOTAL 109,451
Turnout: 61% Diff (St): 2 Diff (US): 0


1980 President, Winnebago County, IL
CandidateVotesPct
Ronald Reagan (R) 48,825 46.5%
Jimmy Carter* (D) 32,384 30.8%
John Anderson (I) 22,596 21.5%
Edward Clark (Lbt) 1,089 1.0%
Other 195 0.2%
TOTAL 105,089
Turnout: 60% Diff (St): -3 Diff (US): -4


1976 President, Winnebago County, IL
CandidateVotesPct
Jimmy Carter (D) 42,399 43.5%
Gerald Ford* (R) 52,736 54.2%
Eugene McCarthy (I) 1,044 1.1%
Other 1,208 1.2%
TOTAL 97,387
Turnout: 59% Diff (St): 4 Diff (US): 6


1972 President, Winnebago County, IL
CandidateVotesPct
Richard Nixon* (R) 57,682 61.4%
George McGovern (D) 35,937 38.2%
Other 394 0.4%
TOTAL 94,013
Turnout: 57% Diff (St): 2 Diff (US): 1


1968 President, Winnebago County, IL
CandidateVotesPct
Richard Nixon (R) 47,646 52.5%
Hubert Humphrey (D) 36,702 40.4%
George Wallace (AIP) 6,176 6.8%
Other 215 0.2%
TOTAL 90,739
Turnout: 62% Diff (St): 5 Diff (US): 9


1964 President, Winnebago County, IL
CandidateVotesPct
Lyndon Johnson* (D) 48,834 55.0%
Barry Goldwater (R) 39,920 45.0%
TOTAL 88,754
Turnout: 65% Diff (St): 4 Diff (US): 6


1960 President, Winnebago County, IL
CandidateVotesPct
John Kennedy (D) 40,090 44.7%
Richard Nixon (R) 49,541 55.2%
Other 110 0.1%
TOTAL 89,741
Turnout: 70% Diff (St): 5 Diff (US): 6


1956 President, Winnebago County, IL
CandidateVotesPct
Dwight Eisenhower* (R) 48,332 62.4%
Adlai Stevenson (D) 29,063 37.5%
Other 89 0.1%
TOTAL 77,484
Turnout: 63% Diff (St): 3 Diff (US): 5


1952 President, Winnebago County, IL
CandidateVotesPct
Dwight Eisenhower (R) 43,468 58.0%
Adlai Stevenson (D) 31,409 41.9%
Other 127 0.2%
TOTAL 75,004
Turnout: 69% Diff (St): 3 Diff (US): 3


1948 President, Winnebago County, IL
CandidateVotesPct
Harry Truman* (D) 27,145 47.4%
Thomas Dewey (R) 29,537 51.5%
Other 631 1.1%
TOTAL 57,313
Turnout: 59% Diff (St): 2 Diff (US): 6


1944 President, Winnebago County, IL
CandidateVotesPct
Franklin Roosevelt* (D) 27,831 47.2%
Thomas Dewey (R) 30,837 52.3%
Other 277 0.5%
TOTAL 58,945
Turnout: 66% Diff (St): 4 Diff (US): 6


1940 President, Winnebago County, IL
CandidateVotesPct
Franklin Roosevelt* (D) 28,061 47.5%
Wendell Willkie (R) 30,683 51.9%
Other 383 0.6%
TOTAL 59,127
Turnout: 73% Diff (St): 3 Diff (US): 7


1936 President, Winnebago County, IL
CandidateVotesPct
Franklin Roosevelt* (D) 27,200 50.4%
Alf Landon (R) 24,997 46.3%
William Lemke (Union) 1,468 2.7%
Norman Thomas (Soc) 212 0.4%
Other 112 0.2%
TOTAL 53,989
Turnout: 73% Diff (St): 7 Diff (US): 10


1932 President, Winnebago County, IL
CandidateVotesPct
Franklin Roosevelt (D) 17,707 38.0%
Herbert Hoover* (R) 26,632 57.1%
Norman Thomas (Soc) 1,794 3.8%
Other 492 1.1%
TOTAL 46,625
Turnout: 64% Diff (St): 15 Diff (US): 18


1928 President, Winnebago County, IL
CandidateVotesPct
Herbert Hoover (R) 33,258 80.4%
Al Smith (D) 7,684 18.6%
Norman Thomas (Soc) 269 0.7%
Other 161 0.4%
TOTAL 41,372
Turnout: 62% Diff (St): 23 Diff (US): 22


1924 President, Winnebago County, IL
CandidateVotesPct
Calvin Coolidge (R) 21,978 71.3%
John Davis (D) 2,228 7.2%
Robert LaFollette (Prog) 6,434 20.9%
Other 174 0.6%
TOTAL 30,814
Turnout: 51% Diff (St): 12 Diff (US): 17


1920 President, Winnebago County, IL
CandidateVotesPct
Warren Harding (R) 19,913 79.2%
James Cox (D) 3,355 13.3%
Eugene Debs (Soc) 1,175 4.7%
Parley Christiansen (FL) 507 2.0%
Aaron Watkins (Proh) 159 0.6%
Other 25 0.1%
TOTAL 25,134
Turnout: 47% Diff (St): 11 Diff (US): 19


1916 President, Winnebago County, IL
CandidateVotesPct
Woodrow Wilson* (D) 6,198 27.1%
Charles Evans Hughes (R) 14,893 65.0%
Allan Benson (Soc) 1,439 6.3%
James Hanly (Proh) 352 1.5%
Other 15 0.1%
TOTAL 22,897
Turnout: 49% Diff (St): 12 Diff (US): 19


1912 President, Winnebago County, IL
CandidateVotesPct
Woodrow Wilson (D) 2,276 17.4%
Theodore Roosevelt (Prog) 7,089 54.1%
William Taft* (R) 2,537 19.4%
Eugene Debs (Soc) 955 7.3%
Eugene Chafin (Proh) 210 1.6%
Other 38 0.3%
TOTAL 13,105
Turnout: 33% Diff (St): -3 Diff (US): -4


1908 President, Winnebago County, IL
CandidateVotesPct
William Taft (R) 8,919 71.5%
William J. Bryan (D) 2,163 17.3%
Eugene Debs (Soc) 747 6.0%
Eugene Chafin (Proh) 531 4.3%
Thomas Hisgen (I) 67 0.5%
Other 40 0.3%
TOTAL 12,467
Turnout: 37% Diff (St): 17 Diff (US): 20


1904 President, Winnebago County, IL
CandidateVotesPct
Theodore Roosevelt (R) 8,143 74.8%
Alton Parker (D) 1,177 10.8%
Eugene Debs (Soc) 666 6.1%
Silas Swallow (Proh) 825 7.6%
Thomas Watson (Pop) 37 0.3%
Other 39 0.4%
TOTAL 10,887
Turnout: 36% Diff (St): 16 Diff (US): 18


1900 President, Winnebago County, IL
CandidateVotesPct
William McKinley* (R) 8,103 72.7%
William J. Bryan (D) 2,498 22.4%
John Woolley (Proh) 433 3.9%
Eugene Debs (Soc) 75 0.7%
Other 38 0.3%
TOTAL 11,147
Turnout: 42% Diff (St): 20 Diff (US): 21
* incumbent

Historical Statewide Election Results for Winnebago County, IL

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

YearTypeTurnout WinnerRunner-Up OtherTotal VotesDiff PSV
2022 S3 41% Tammy Duckworth* (D) 43,384 49.3% Kathy Salvi (R) 42,972 48.8% 1,646 [+] 1.9% 88,002 7 2.15%
2022 G 41% Darren Bailey (R) 43,492 49.4% J.B. Pritzker* (D) 41,987 47.7% 2,598 [+] 2.9% 88,077 7 2.15%
2020 S2 59% Richard Durbin* (D) 61,182 48.4% Mark Curran (R) 60,473 47.8% 4,733 [+] 3.7% 126,388 9 2.12%
2018 G 44% J.B. Pritzker (D) 43,440 45.6% Bruce Rauner* (R) 41,156 43.2% 10,712 [+] 11.2% 95,308 4 2.10%
2016 S3 54% Mark Kirk* (R) 57,643 48.8% Tammy Duckworth (D) 52,730 44.6% 7,797 [+] 6.6% 118,170 9 2.15%
2014 S2 36% Jim Oberweis (R) 40,239 51.0% Richard Durbin* (D) 35,436 44.9% 3,184 [+] 4.0% 78,859 8 2.19%
2014 G 36% Bruce Rauner (R) 44,785 56.8% Pat Quinn* (D) 30,691 38.9% 3,403 [+] 4.3% 78,879 7 2.17%
2010 S3 36% Mark Kirk (R) 44,622 55.5% Alexi Giannoulias (D) 29,144 36.3% 6,588 [+] 8.2% 80,354 8 2.17%
2010 G 37% Bill Brady (R) 46,492 56.8% Pat Quinn* (D) 28,398 34.7% 6,983 [+] 8.5% 81,873 11 2.19%
2008 S2 56% Richard Durbin* (D) 73,518 59.8% Steve Sauerberg (R) 43,066 35.0% 6,337 [+] 5.2% 122,921 7 2.31%
2006 G 36% Rod Blagojevich* (D) 32,383 41.5% Judy Baar Topinka (R) 26,147 33.5% 19,586 [+] 25.1% 78,116 -6 2.24%
2004 S3 56% Barack Obama (D) 74,911 62.9% Alan Keyes (R) 40,470 34.0% 3,727 [+] 3.1% 119,108 7 2.32%
2002 S2 37% Richard Durbin* (D) 42,442 55.4% Jim Durkin (R) 32,520 42.4% 1,693 [+] 2.2% 76,655 4 2.20%
2002 G 37% Rod Blagojevich (D) 37,060 48.0% Jim Ryan (R) 36,798 47.6% 3,430 [+] 4.4% 77,288 3 2.18%
1998 S3 35% Peter Fitzgerald (R) 44,538 63.2% Carol Moseley-Braun* (D) 23,795 33.7% 2,188 [+] 3.1% 70,521 13 2.08%
1998 G 35% George Ryan (R) 43,805 62.3% Glenn Poshard (D) 25,340 36.0% 1,203 [+] 1.7% 70,348 11 2.09%
1996 S2 50% Al Salvi (R) 50,985 51.7% Richard Durbin (D) 43,987 44.6% 3,726 [+] 3.8% 98,698 11 2.32%
1994 G 35% Jim Edgar* (R) 49,053 71.4% Dawn Clark Netsch (D) 17,087 24.9% 2,557 [+] 3.7% 68,697 8 2.21%
1992 S3 58% Carol Moseley-Braun (D) 51,962 47.2% Richard Williamson (R) 50,404 45.8% 7,739 [+] 7.0% 110,105 3 2.23%
1990 S2 39% Paul Simon* (D) 42,143 58.4% Lynn Martin (R) 29,961 41.6% 0 0.0% 72,104 7 2.22%
1990 G 38% Jim Edgar (R) 40,910 57.1% Neil Hartigan (D) 29,990 41.9% 692 [+] 1.0% 71,592 6 2.20%
1986 S3 35% Alan Dixon* (D) 37,162 58.6% Judy Koehler (R) 25,591 40.4% 655 [+] 1.0% 63,408 7 2.03%
1986 G 35% James Thompson* (R) 37,805 59.5% Adlai Stevenson III (Illinois Solidarity) 21,480 33.8% 4,209 [+] 6.6% 63,494 7 2.02%
1984 S2 60% Charles Percy* (R) 57,367 52.8% Paul Simon (D) 49,215 45.3% 2,157 [+] 2.0% 108,739 5 2.27%
1982 G 43% James Thompson* (R) 37,946 49.9% Adlai Stevenson III (D) 36,746 48.3% 1,383 [+] 1.8% 76,075 0 2.07%
1980 S3 59% Alan Dixon (D) 51,969 50.3% David O'Neal (R) 49,675 48.1% 1,641 [+] 1.6% 103,285 6 2.26%
1978 S2 37% Charles Percy* (R) 33,491 53.9% Alex Seith (D) 27,684 44.5% 977 [+] 1.6% 62,152 1 1.95%
1978 G 37% James Thompson* (R) 35,939 58.0% Michael Bakalis (D) 25,317 40.9% 717 [+] 1.2% 61,973 -1 1.97%
1976 G 57% James Thompson (R) 73,114 77.1% Michael Howlitt (D) 20,839 22.0% 826 [+] 0.9% 94,779 12 2.04%
1974 S3 39% Adlai Stevenson III* (D) 39,505 61.6% George Burditt (R) 24,322 37.9% 266 [+] 0.4% 64,093 1 2.20%
1972 S2 56% Charles Percy* (R) 61,625 66.8% Roman Pucinski (D) 30,367 32.9% 263 [+] 0.3% 92,255 5 2.00%
1972 G 57% Daniel Walker (D) 52,566 56.1% Richard Ogilvie* (R) 40,922 43.7% 189 [+] 0.2% 93,677 -5 2.00%
1970 S3 42% Adlai Stevenson III (D) 35,209 54.7% Ralph Smith* (R) 29,018 45.1% 98 [+] 0.2% 64,325 3 1.79%
1968 S3 60% Everett Dirksen* (R) 53,818 61.8% William Clark (D) 33,103 38.0% 126 [+] 0.1% 87,047 9 1.96%
1968 G 60% Richard Ogilvie (R) 49,316 55.9% Samuel Shapiro* (D) 38,739 43.9% 123 [+] 0.1% 88,178 5 1.96%
1966 S2 46% Charles Percy (R) 38,631 59.9% Paul Douglas* (D) 24,990 38.7% 887 [+] 1.4% 64,508 5 1.69%
1964 G 64% Otto Kerner* (D) 44,326 50.6% Charles Percy (R) 43,329 49.4% 0 0.0% 87,655 1 1.88%
1962 S3 46% Everett Dirksen* (R) 35,471 58.0% Sidney Yates (D) 25,673 42.0% 0 0.0% 61,144 5 1.65%
1960 S2 68% Paul Douglas* (D) 44,731 51.2% Samuel Witwer (R) 42,581 48.7% 68 [+] 0.1% 87,380 4 1.89%
1960 G 69% Otto Kerner (D) 47,785 54.4% William Stratton* (R) 40,051 45.6% 82 [+] 0.1% 87,918 1 1.88%
*: incumbent               +: ran on additional party lines               Type: G: Governor; S1,S2,S3: Senate Class 1, 2 or 3
italics: special election           RO: runoff election           PSV: percent of state vote


Historical U.S. House Election Results for Winnebago County, IL

Click on the District to view county-level data for that election (where available).

DateDistrictWinnerRunner-Up OtherTotal Votes
2022-11-08 IL16Darin LaHood* (R) 30,151 59.9% Elizabeth Haderlein (D) 20,159 40.1% 0 0.0% 50,310
2022-11-08 IL17Eric Sorenson (D) 21,424 57.5% Esther King (R) 15,813 42.5% 0 0.0% 37,237
County Total for 2022-11-08:   87,547
2020-11-03 IL16Adam Kinzinger* (R) 57,530 60.4% Dani Brzozowski (D) 37,774 39.6% 0 0.0% 95,304
2020-11-03 IL17Cheri Bustos* (D) 19,325 64.6% Esther King (R) 10,594 35.4% 0 0.0% 29,919
County Total for 2020-11-03:   125,223
2018-11-06 IL16Adam Kinzinger* (R) 40,072 55.0% Sara Dady (D) 32,797 45.0% 2 0.0% 72,871
2018-11-06 IL17Cheri Bustos* (D) 15,913 69.9% Bill Fawell (R) 6,864 30.1% 0 0.0% 22,777
County Total for 2018-11-06:   95,648
2016-11-08 IL16Adam Kinzinger* (R) 71,972 100.0% 13 0.0% 71,985
2016-11-08 IL17Cheri Bustos* (D) 21,213 70.0% Patrick Harlan (R) 9,083 30.0% 0 0.0% 30,296
County Total for 2016-11-08:   102,281
2014-11-04 IL16Adam Kinzinger* (R) 42,553 71.6% Randall Olson (D) 16,908 28.4% 0 0.0% 59,461
2014-11-04 IL17Cheri Bustos* (D) 12,588 66.6% Bobby Schilling (R) 6,300 33.4% 0 0.0% 18,888
County Total for 2014-11-04:   78,349
2012-11-06 IL16Adam Kinzinger* (R) 49,914 60.2% Wanda Rohl (D) 33,006 39.8% 0 0.0% 82,920
2012-11-06 IL17Cheri Bustos (D) 19,699 64.4% Bobby Schilling* (R) 10,885 35.6% 0 0.0% 30,584
County Total for 2012-11-06:   113,504
2010-11-02 IL16Donald Manzullo* (R) 50,943 62.0% George Gaulrapp (D) 28,294 34.4% 2,913 3.5% 82,150
County Total for 2010-11-02:   82,150
2008-11-04 IL16Donald Manzullo* (R) 72,014 57.8% Robert Abboud (D) 49,005 39.3% 3,535 2.8% 124,554
County Total for 2008-11-04:   124,554
2006-11-07 IL16Donald Manzullo* (R) 47,717 61.0% Richard Auman (D) 24,889 31.8% 5,584 7.1% 78,190
County Total for 2006-11-07:   78,190
2004-11-02 IL16Donald Manzullo* (R) 79,043 66.3% John Kutsch (D) 40,111 33.7% 3 0.0% 119,157
County Total for 2004-11-02:   119,157
2002-11-05 IL16Donald Manzullo* (R) 52,275 67.7% John Kutsch (D) 24,895 32.3% 0 0.0% 77,170
County Total for 2002-11-05:   77,170
2000-11-07 IL16Donald Manzullo* (R) 67,173 63.2% Charles Hendrickson (D) 39,013 36.7% 51 0.0% 106,237
County Total for 2000-11-07:   106,237
1998-11-03 IL16Donald Manzullo* (R) 55,667 100.0% 0 0.0% 55,667
County Total for 1998-11-03:   55,667
1996-11-05 IL16Donald Manzullo* (R) 55,922 59.3% Catherine Lee (D) 38,433 40.7% 0 0.0% 94,355
County Total for 1996-11-05:   94,355
1994-11-08 IL16Donald Manzullo* (R) 45,703 66.4% Pete Sullivan (D) 23,077 33.6% 0 0.0% 68,780
County Total for 1994-11-08:   68,780
1992-11-03 IL16John Cox* (D) 56,871 51.2% Donald Manzullo (R) 54,150 48.8% 0 0.0% 111,021
County Total for 1992-11-03:   111,021
*: incumbent           sp: special election           RO: runoff election

Voter Registration Data for Winnebago County, IL

Party registration is not used in this state, however as of 2022 registrations in Winnebago County, IL were estimated to be 25% Republican and 31% Democrat.

YearTotalRepublicanDemocratOtherR/D EdgeR/D Edge %VAPOP %
2022 179,195 0 0.0% 0 0.0% 179,195 100.0% n/a n/a 83%
2020 183,378 0 0.0% 0 0.0% 183,378 100.0% n/a n/a 85%
2018 179,005 0 0.0% 0 0.0% 179,005 100.0% n/a n/a 83%
2016 178,786 0 0.0% 0 0.0% 178,786 100.0% n/a n/a 82%
2012 174,909 0 0.0% 0 0.0% 174,909 100.0% n/a n/a 79%
2010 179,182 0 0.0% 0 0.0% 179,182 100.0% n/a n/a 81%
2008 188,795 0 0.0% 0 0.0% 188,795 100.0% n/a n/a 86%
2006 184,352 0 0.0% 0 0.0% 184,352 100.0% n/a n/a 86%
2004 194,530 0 0.0% 0 0.0% 194,530 100.0% n/a n/a 92%
2000 171,589 0 0.0% 0 0.0% 171,589 100.0% n/a n/a 84%
1994 137,826 0 0.0% 0 0.0% 137,826 100.0% n/a n/a 71%
1986 128,439 0 0.0% 0 0.0% 128,439 100.0% n/a n/a 70%
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.