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DuPage County, IL


Metropolitan Statistical Area: Chicago-Naperville-Elgin, IL-IN-WI
Designated Market Area: Chicago, IL-IN
American Communities Project County Type (2023): Urban Suburbs

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

 

Tracts in DuPage County, IL

   



Click here to view demographic data for DuPage County, IL

2022 population: 920,901   ( 3,977 from 2010 , 11,976 from 2020)
Land area: 327.8 square miles
Population density: 2809.4 persons per square mile

2022 Census data
White:590,814 64.16% 8.6%
Black:47,5655.17% 15.9%
Indian:9440.10% 4.8%
Asian:123,35713.40% 34.1%
2+ races:16,9081.84% 19.7%
Hispanic:141,31315.35% 16.3%
Total non-White:330,08735.84% 21.9%

2020-2022 ComponentsNumberRate
Births:20,892 11.2
Deaths:16,7069.0
Net Migration: -21,337-11.4
Net Immigration: 4,8752.6
Change in White population:-55,316 -6.0
Change in Non-White pop.:59,293 6.5



Historical Presidential Election Results for DuPage County, IL

Recent Trends
VotesΔ MarginSwing %
2020 vs. 2016 R +27,196 D +25,404 D + 2.7%
D +52,600
2020 vs. 2012 R -1,435 D +83,197 D + 17.3%
D +81,762
2020 vs. 2008 R +9,985 D +42,539 D + 7.5%
D +52,524
2016 vs. 2008 R -17,211 D +17,135 D + 4.8%
D -76
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 69% Joe Biden (D) 281,222 57.7% Donald Trump* (R) 193,611 39.7% 12,930 [+] 2.7% 487,763 -1 -7 8.06%
2016 61% Hillary Clinton (D) 228,622 53.1% Donald Trump (R) 166,415 38.6% 35,637 [+] 8.3% 430,674 0 -7 7.70%
2012 58% Barack Obama* (D) 199,460 49.7% Mitt Romney (R) 195,046 48.6% 6,575 [+] 1.6% 401,081 8 1 7.64%
2008 61% Barack Obama (D) 228,698 54.7% John McCain (R) 183,626 43.9% 5,649 [+] 1.4% 417,973 7 -2 7.56%
2004 60% George W. Bush* (R) 218,902 54.4% John Kerry (D) 180,097 44.8% 3,447 [+] 0.9% 402,446 10 4 7.63%
2000 55% George W. Bush (R) 201,037 55.2% Albert Gore, Jr. (D) 152,550 41.9% 10,775 [+] 3.0% 364,362 13 7 7.68%
1996 52% Robert Dole (R) 164,630 50.7% Bill Clinton* (D) 129,709 40.0% 30,147 [+] 9.3% 324,486 14 10 7.53%
1992 63% George Bush* (R) 178,271 48.1% Bill Clinton (D) 114,564 30.9% 78,152 [+] 21.1% 370,987 14 11 7.35%
1988 57% George Bush (R) 217,907 69.4% Michael Dukakis (D) 94,285 30.0% 1,862 [+] 0.6% 314,054 19 16 6.89%
1984 59% Ronald Reagan* (R) 227,141 75.7% Walter Mondale (D) 71,430 23.8% 1,644 0.5% 300,215 19 17 6.23%
1980 61% Ronald Reagan (R) 182,308 64.0% Jimmy Carter* (D) 68,991 24.2% 33,450 [+] 11.7% 284,749 14 13 6.00%
1976 65% Gerald Ford* (R) 175,055 68.8% Jimmy Carter (D) 72,137 28.3% 7,355 [+] 2.9% 254,547 19 21 5.39%
1972 66% Richard Nixon* (R) 172,341 75.0% George McGovern (D) 57,043 24.8% 355 [+] 0.2% 229,739 16 14 4.86%
1968 67% Richard Nixon (R) 124,893 66.6% Hubert Humphrey (D) 48,492 25.9% 14,111 [+] 7.5% 187,496 20 23 4.06%
1964 70% Barry Goldwater (R) 98,871 59.9% Lyndon Johnson* (D) 66,229 40.1% 0 0.0% 165,100 19 21 3.51%
1960 76% Richard Nixon (R) 101,014 69.5% John Kennedy (D) 44,263 30.4% 168 0.1% 145,445 20 20 3.06%
1956 69% Dwight Eisenhower* (R) 91,834 79.8% Adlai Stevenson (D) 23,103 20.1% 207 0.2% 115,144 20 22 2.61%
1952 76% Dwight Eisenhower (R) 71,134 75.8% Adlai Stevenson (D) 22,489 24.0% 217 0.2% 93,840 21 21 2.09%
1948 65% Thomas Dewey (R) 45,794 73.6% Harry Truman* (D) 15,528 24.9% 916 [+] 1.5% 62,238 24 28 1.56%
1944 74% Thomas Dewey (R) 41,890 68.9% Franklin Roosevelt* (D) 18,711 30.8% 174 0.3% 60,775 21 23 1.51%
1940 87% Wendell Willkie (R) 40,746 67.9% Franklin Roosevelt* (D) 18,923 31.5% 380 0.6% 60,049 19 23 1.42%
1936 84% Alf Landon (R) 28,380 55.0% Franklin Roosevelt* (D) 21,684 42.0% 1,568 [+] 3.0% 51,632 15 18 1.30%
1932 78% Herbert Hoover* (R) 25,758 56.2% Franklin Roosevelt (D) 18,547 40.5% 1,504 [+] 3.3% 45,809 14 17 1.34%
1928 79% Herbert Hoover (R) 28,016 72.4% Al Smith (D) 10,479 27.1% 217 [+] 0.6% 38,712 15 14 1.25%
1924 63% Calvin Coolidge (R) 16,917 72.8% Robert LaFollette (Prog) 4,378 18.8% 1,938 [+] 8.3% 23,233 14 19 0.94%
1920 60% Warren Harding (R) 12,280 82.0% James Cox (D) 2,084 13.9% 612 [+] 4.1% 14,976 14 22 0.71%
1916 68% Charles Evans Hughes (R) 9,610 62.8% Woodrow Wilson* (D) 4,816 31.5% 868 [+] 5.7% 15,294 10 17 0.70%
1912 39% Theodore Roosevelt (Prog) 4,169 52.4% Woodrow Wilson (D) 2,236 28.1% 1,556 [+] 19.5% 7,961 -8 -9 0.69%
1908 39% William Taft (R) 4,530 64.0% William J. Bryan (D) 1,975 27.9% 575 [+] 8.1% 7,080 9 12 0.61%
1904 36% Theodore Roosevelt (R) 4,078 68.1% Alton Parker (D) 1,407 23.5% 506 [+] 8.4% 5,991 9 12 0.56%
1900 39% William McKinley* (R) 3,869 63.9% William J. Bryan (D) 1,947 32.2% 237 [+] 3.9% 6,053 11 12 0.53%
* incumbent         PSV: percent of state vote



2020 President, DuPage County, IL
CandidateVotesPct
Joe Biden (D) 281,222 57.7%
Donald Trump* (R) 193,611 39.7%
Jo Jorgensen (Lbt) 6,249 1.3%
Other 6,681 1.4%
TOTAL 487,763
Turnout: 69% Diff (St): -1 Diff (US): -7


2016 President, DuPage County, IL
CandidateVotesPct
Hillary Clinton (D) 228,622 53.1%
Donald Trump (R) 166,415 38.6%
Gary Johnson (Lbt) 20,357 4.7%
Jill Stein (Grn) 6,367 1.5%
Other 8,913 2.1%
TOTAL 430,674
Turnout: 61% Diff (St): 0 Diff (US): -7


2012 President, DuPage County, IL
CandidateVotesPct
Barack Obama* (D) 199,460 49.7%
Mitt Romney (R) 195,046 48.6%
Gary Johnson (Lbt) 4,515 1.1%
Other 2,060 0.5%
TOTAL 401,081
Turnout: 58% Diff (St): 8 Diff (US): 1


2008 President, DuPage County, IL
CandidateVotesPct
Barack Obama (D) 228,698 54.7%
John McCain (R) 183,626 43.9%
Ralph Nader (I) 2,191 0.5%
Bob Barr (Lbt) 1,844 0.4%
Other 1,614 0.4%
TOTAL 417,973
Turnout: 61% Diff (St): 7 Diff (US): -2


2004 President, DuPage County, IL
CandidateVotesPct
George W. Bush* (R) 218,902 54.4%
John Kerry (D) 180,097 44.8%
Other 3,447 0.9%
TOTAL 402,446
Turnout: 60% Diff (St): 10 Diff (US): 4


2000 President, DuPage County, IL
CandidateVotesPct
George W. Bush (R) 201,037 55.2%
Albert Gore, Jr. (D) 152,550 41.9%
Ralph Nader (Grn) 8,711 2.4%
Pat Buchanan (Ref) 883 0.2%
Other 1,181 0.3%
TOTAL 364,362
Turnout: 55% Diff (St): 13 Diff (US): 7


1996 President, DuPage County, IL
CandidateVotesPct
Bill Clinton* (D) 129,709 40.0%
Robert Dole (R) 164,630 50.7%
Ross Perot (Ref) 27,419 8.4%
Harry Browne (Lbt) 1,798 0.6%
Other 930 0.3%
TOTAL 324,486
Turnout: 52% Diff (St): 14 Diff (US): 10


1992 President, DuPage County, IL
CandidateVotesPct
Bill Clinton (D) 114,564 30.9%
George Bush* (R) 178,271 48.1%
Ross Perot (I) 76,839 20.7%
Other 1,313 0.4%
TOTAL 370,987
Turnout: 63% Diff (St): 14 Diff (US): 11


1988 President, DuPage County, IL
CandidateVotesPct
George Bush (R) 217,907 69.4%
Michael Dukakis (D) 94,285 30.0%
Ron Paul (Lbt) 1,180 0.4%
Other 682 0.2%
TOTAL 314,054
Turnout: 57% Diff (St): 19 Diff (US): 16


1984 President, DuPage County, IL
CandidateVotesPct
Ronald Reagan* (R) 227,141 75.7%
Walter Mondale (D) 71,430 23.8%
Other 1,644 0.5%
TOTAL 300,215
Turnout: 59% Diff (St): 19 Diff (US): 17


1980 President, DuPage County, IL
CandidateVotesPct
Ronald Reagan (R) 182,308 64.0%
Jimmy Carter* (D) 68,991 24.2%
John Anderson (I) 29,810 10.5%
Edward Clark (Lbt) 2,977 1.0%
Other 663 0.2%
TOTAL 284,749
Turnout: 61% Diff (St): 14 Diff (US): 13


1976 President, DuPage County, IL
CandidateVotesPct
Jimmy Carter (D) 72,137 28.3%
Gerald Ford* (R) 175,055 68.8%
Eugene McCarthy (I) 4,058 1.6%
Other 3,297 1.3%
TOTAL 254,547
Turnout: 65% Diff (St): 19 Diff (US): 21


1972 President, DuPage County, IL
CandidateVotesPct
Richard Nixon* (R) 172,341 75.0%
George McGovern (D) 57,043 24.8%
Other 355 0.2%
TOTAL 229,739
Turnout: 66% Diff (St): 16 Diff (US): 14


1968 President, DuPage County, IL
CandidateVotesPct
Richard Nixon (R) 124,893 66.6%
Hubert Humphrey (D) 48,492 25.9%
George Wallace (AIP) 13,814 7.4%
Other 297 0.2%
TOTAL 187,496
Turnout: 67% Diff (St): 20 Diff (US): 23


1960 President, DuPage County, IL
CandidateVotesPct
John Kennedy (D) 44,263 30.4%
Richard Nixon (R) 101,014 69.5%
Other 168 0.1%
TOTAL 145,445
Turnout: 76% Diff (St): 20 Diff (US): 20


1956 President, DuPage County, IL
CandidateVotesPct
Dwight Eisenhower* (R) 91,834 79.8%
Adlai Stevenson (D) 23,103 20.1%
Other 207 0.2%
TOTAL 115,144
Turnout: 69% Diff (St): 20 Diff (US): 22


1952 President, DuPage County, IL
CandidateVotesPct
Dwight Eisenhower (R) 71,134 75.8%
Adlai Stevenson (D) 22,489 24.0%
Other 217 0.2%
TOTAL 93,840
Turnout: 76% Diff (St): 21 Diff (US): 21


1948 President, DuPage County, IL
CandidateVotesPct
Harry Truman* (D) 15,528 24.9%
Thomas Dewey (R) 45,794 73.6%
Other 916 1.5%
TOTAL 62,238
Turnout: 65% Diff (St): 24 Diff (US): 28


1944 President, DuPage County, IL
CandidateVotesPct
Franklin Roosevelt* (D) 18,711 30.8%
Thomas Dewey (R) 41,890 68.9%
Other 174 0.3%
TOTAL 60,775
Turnout: 74% Diff (St): 21 Diff (US): 23


1940 President, DuPage County, IL
CandidateVotesPct
Franklin Roosevelt* (D) 18,923 31.5%
Wendell Willkie (R) 40,746 67.9%
Other 380 0.6%
TOTAL 60,049
Turnout: 87% Diff (St): 19 Diff (US): 23


1936 President, DuPage County, IL
CandidateVotesPct
Franklin Roosevelt* (D) 21,684 42.0%
Alf Landon (R) 28,380 55.0%
William Lemke (Union) 1,330 2.6%
Norman Thomas (Soc) 177 0.3%
Other 61 0.1%
TOTAL 51,632
Turnout: 84% Diff (St): 15 Diff (US): 18


1932 President, DuPage County, IL
CandidateVotesPct
Franklin Roosevelt (D) 18,547 40.5%
Herbert Hoover* (R) 25,758 56.2%
Norman Thomas (Soc) 1,364 3.0%
Other 140 0.3%
TOTAL 45,809
Turnout: 78% Diff (St): 14 Diff (US): 17


1928 President, DuPage County, IL
CandidateVotesPct
Herbert Hoover (R) 28,016 72.4%
Al Smith (D) 10,479 27.1%
Norman Thomas (Soc) 181 0.5%
Other 36 0.1%
TOTAL 38,712
Turnout: 79% Diff (St): 15 Diff (US): 14


1924 President, DuPage County, IL
CandidateVotesPct
Calvin Coolidge (R) 16,917 72.8%
John Davis (D) 1,893 8.1%
Robert LaFollette (Prog) 4,378 18.8%
Other 45 0.2%
TOTAL 23,233
Turnout: 63% Diff (St): 14 Diff (US): 19


1920 President, DuPage County, IL
CandidateVotesPct
Warren Harding (R) 12,280 82.0%
James Cox (D) 2,084 13.9%
Eugene Debs (Soc) 349 2.3%
Parley Christiansen (FL) 121 0.8%
Aaron Watkins (Proh) 127 0.8%
Other 15 0.1%
TOTAL 14,976
Turnout: 60% Diff (St): 14 Diff (US): 22


1916 President, DuPage County, IL
CandidateVotesPct
Woodrow Wilson* (D) 4,816 31.5%
Charles Evans Hughes (R) 9,610 62.8%
Allan Benson (Soc) 378 2.5%
James Hanly (Proh) 480 3.1%
Other 10 0.1%
TOTAL 15,294
Turnout: 68% Diff (St): 10 Diff (US): 17


1912 President, DuPage County, IL
CandidateVotesPct
Woodrow Wilson (D) 2,236 28.1%
Theodore Roosevelt (Prog) 4,169 52.4%
William Taft* (R) 1,136 14.3%
Eugene Debs (Soc) 193 2.4%
Eugene Chafin (Proh) 215 2.7%
Other 12 0.2%
TOTAL 7,961
Turnout: 39% Diff (St): -8 Diff (US): -9


1908 President, DuPage County, IL
CandidateVotesPct
William Taft (R) 4,530 64.0%
William J. Bryan (D) 1,975 27.9%
Eugene Debs (Soc) 77 1.1%
Eugene Chafin (Proh) 449 6.3%
Thomas Hisgen (I) 40 0.6%
Other 9 0.1%
TOTAL 7,080
Turnout: 39% Diff (St): 9 Diff (US): 12


1904 President, DuPage County, IL
CandidateVotesPct
Theodore Roosevelt (R) 4,078 68.1%
Alton Parker (D) 1,407 23.5%
Eugene Debs (Soc) 126 2.1%
Silas Swallow (Proh) 352 5.9%
Thomas Watson (Pop) 17 0.3%
Other 11 0.2%
TOTAL 5,991
Turnout: 36% Diff (St): 9 Diff (US): 12


1900 President, DuPage County, IL
CandidateVotesPct
William McKinley* (R) 3,869 63.9%
William J. Bryan (D) 1,947 32.2%
John Woolley (Proh) 208 3.4%
Eugene Debs (Soc) 12 0.2%
Other 17 0.3%
TOTAL 6,053
Turnout: 39% Diff (St): 11 Diff (US): 12
* incumbent

Historical Statewide Election Results for DuPage County, IL

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

YearTypeTurnout WinnerRunner-Up OtherTotal VotesDiff PSV
2022 S3 48% Tammy Duckworth* (D) 194,606 56.9% Kathy Salvi (R) 141,316 41.4% 5,818 [+] 1.7% 341,740 0 8.34%
2022 G 48% J.B. Pritzker* (D) 190,601 56.0% Darren Bailey (R) 138,667 40.7% 11,041 [+] 3.2% 340,309 -2 8.29%
2020 S2 68% Richard Durbin* (D) 264,921 54.8% Mark Curran (R) 196,759 40.7% 22,091 [+] 4.6% 483,771 2 8.10%
2018 G 51% J.B. Pritzker (D) 176,556 48.4% Bruce Rauner* (R) 168,347 46.1% 20,131 [+] 5.5% 365,034 7 8.03%
2016 S3 60% Tammy Duckworth (D) 208,669 49.1% Mark Kirk* (R) 193,069 45.4% 23,142 [+] 5.4% 424,880 6 7.74%
2014 S2 41% Jim Oberweis (R) 144,505 50.6% Richard Durbin* (D) 129,941 45.5% 11,164 [+] 3.9% 285,610 8 7.93%
2014 G 41% Bruce Rauner (R) 174,041 60.8% Pat Quinn* (D) 105,374 36.8% 6,800 [+] 2.4% 286,215 11 7.89%
2010 S3 41% Mark Kirk (R) 163,875 57.5% Alexi Giannoulias (D) 106,429 37.3% 14,672 [+] 5.1% 284,976 9 7.69%
2010 G 41% Bill Brady (R) 154,986 54.3% Pat Quinn* (D) 110,117 38.6% 20,280 [+] 7.1% 285,383 8 7.65%
2008 S2 60% Richard Durbin* (D) 240,521 58.7% Steve Sauerberg (R) 154,134 37.6% 14,983 [+] 3.7% 409,638 9 7.69%
2006 G 39% Judy Baar Topinka (R) 132,938 50.5% Rod Blagojevich* (D) 101,859 38.7% 28,393 [+] 10.8% 263,190 11 7.55%
2004 S3 58% Barack Obama (D) 251,445 64.3% Alan Keyes (R) 124,642 31.9% 14,954 [+] 3.8% 391,041 5 7.61%
2002 S2 41% Jim Durkin (R) 147,227 54.3% Richard Durbin* (D) 119,485 44.1% 4,361 [+] 1.6% 271,073 16 7.77%
2002 G 41% Jim Ryan (R) 171,386 63.3% Rod Blagojevich (D) 91,753 33.9% 7,820 [+] 2.9% 270,959 18 7.66%
1998 S3 39% Peter Fitzgerald (R) 158,928 63.2% Carol Moseley-Braun* (D) 85,405 34.0% 6,981 [+] 2.8% 251,314 13 7.40%
1998 G 39% George Ryan (R) 175,223 69.9% Glenn Poshard (D) 71,055 28.4% 4,303 [+] 1.7% 250,581 19 7.46%
1996 S2 51% Al Salvi (R) 169,734 53.0% Richard Durbin (D) 137,810 43.0% 12,645 [+] 3.9% 320,189 12 7.53%
1994 G 37% Jim Edgar* (R) 179,395 78.5% Dawn Clark Netsch (D) 45,548 19.9% 3,564 [+] 1.6% 228,507 15 7.36%
1992 S3 62% Richard Williamson (R) 210,818 57.8% Carol Moseley-Braun (D) 139,402 38.2% 14,337 [+] 3.9% 364,557 15 7.38%
1990 S2 38% Paul Simon* (D) 109,975 50.2% Lynn Martin (R) 108,923 49.8% 0 0.0% 218,898 15 6.73%
1990 G 38% Jim Edgar (R) 149,436 68.1% Neil Hartigan (D) 67,927 31.0% 1,917 [+] 0.9% 219,280 17 6.73%
1986 S3 35% Judy Koehler (R) 95,117 51.2% Alan Dixon* (D) 88,366 47.6% 2,320 [+] 1.2% 185,803 17 5.95%
1986 G 35% James Thompson* (R) 136,238 73.1% Adlai Stevenson III (Illinois Solidarity) 43,412 23.3% 6,669 [+] 3.6% 186,319 20 5.93%
1984 S2 59% Charles Percy* (R) 198,901 66.6% Paul Simon (D) 92,044 30.8% 7,532 [+] 2.5% 298,477 18 6.23%
1982 G 40% James Thompson* (R) 138,502 71.4% Adlai Stevenson III (D) 51,543 26.6% 3,818 [+] 2.0% 193,863 22 5.28%
1980 S3 61% David O'Neal (R) 159,287 56.5% Alan Dixon (D) 118,272 42.0% 4,149 [+] 1.5% 281,708 14 6.15%
1978 S2 40% Charles Percy* (R) 115,197 68.8% Alex Seith (D) 49,606 29.6% 2,573 [+] 1.5% 167,376 15 5.26%
1978 G 40% James Thompson* (R) 129,125 78.0% Michael Bakalis (D) 34,934 21.1% 1,467 [+] 0.9% 165,526 19 5.25%
1976 G 64% James Thompson (R) 205,873 81.5% Michael Howlitt (D) 43,715 17.3% 3,028 [+] 1.2% 252,616 17 5.45%
1974 S3 33% George Burditt (R) 69,480 56.8% Adlai Stevenson III* (D) 52,004 42.5% 881 [+] 0.7% 122,365 20 4.20%
1972 S2 66% Charles Percy* (R) 170,695 74.9% Roman Pucinski (D) 56,863 25.0% 269 [+] 0.1% 227,827 13 4.94%
1972 G 66% Richard Ogilvie* (R) 142,805 62.1% Daniel Walker (D) 87,056 37.8% 157 [+] 0.1% 230,018 13 4.92%
1970 S3 49% Ralph Smith* (R) 85,296 57.1% Adlai Stevenson III (D) 63,826 42.7% 297 [+] 0.2% 149,419 15 4.15%
1968 S3 66% Everett Dirksen* (R) 125,387 68.3% William Clark (D) 57,921 31.5% 324 [+] 0.2% 183,632 15 4.13%
1968 G 66% Richard Ogilvie (R) 128,567 69.8% Samuel Shapiro* (D) 55,197 30.0% 422 [+] 0.2% 184,186 19 4.09%
1966 S2 53% Charles Percy (R) 104,783 76.3% Paul Douglas* (D) 32,513 23.7% 0 0.0% 137,296 21 3.59%
1964 G 70% Charles Percy (R) 114,641 69.8% Otto Kerner* (D) 49,702 30.2% 0 0.0% 164,343 22 3.53%
1962 S3 55% Everett Dirksen* (R) 84,703 72.4% Sidney Yates (D) 32,210 27.6% 0 0.0% 116,913 20 3.15%
1960 S2 75% Samuel Witwer (R) 90,497 62.9% Paul Douglas* (D) 53,367 37.1% 112 [+] 0.1% 143,976 18 3.11%
1960 G 75% William Stratton* (R) 80,436 55.8% Otto Kerner (D) 63,429 44.0% 160 [+] 0.1% 144,025 12 3.08%
*: 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 DuPage County, IL

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

DateDistrictWinnerRunner-Up OtherTotal Votes
2022-11-08 IL03Delia Ramirez (D) 31,447 51.0% Justin Burau (R) 30,245 49.0% 0 0.0% 61,692
2022-11-08 IL04James Falakos (R) 9,161 51.8% Chuy Garcia* (D) 8,186 46.3% 339 1.9% 17,686
2022-11-08 IL06Sean Casten* (D) 75,496 58.6% Keith Pekau (R) 53,344 41.4% 4 0.0% 128,844
2022-11-08 IL08Raja Krishnamoorthi* (D) 26,666 53.4% Chris Dargis (R) 23,314 46.6% 0 0.0% 49,980
2022-11-08 IL11Bill Foster* (D) 50,471 63.0% Catalina Lauf (R) 29,599 37.0% 0 0.0% 80,070
County Total for 2022-11-08:   338,272
2020-11-03 IL03Marie Newman (D) 383 53.0% Mike Fricilone (R) 339 47.0% 0 0.0% 722
2020-11-03 IL05Mike Quigley* (D) 18,682 52.6% Tom Hanson (R) 16,292 45.9% 543 1.5% 35,517
2020-11-03 IL06Sean Casten* (D) 113,822 54.8% Jeanne Ives (R) 90,656 43.6% 3,366 1.6% 207,844
2020-11-03 IL08Raja Krishnamoorthi* (D) 70,360 72.8% Preston Nelson (Libertarian) 26,288 27.2% 0 0.0% 96,648
2020-11-03 IL11Bill Foster* (D) 66,698 61.6% Rick Laib (R) 41,553 38.4% 5 0.0% 108,256
2020-11-03 IL14Lauren Underwood* (D) 5,366 62.4% Jim Oberweis (R) 3,236 37.6% 0 0.0% 8,602
County Total for 2020-11-03:   457,589
2018-11-06 IL03Daniel Lipinski* (D) 350 65.2% Arthur Jones (R) 183 34.1% 4 0.7% 537
2018-11-06 IL05Mike Quigley* (D) 15,230 54.0% Tom Hanson (R) 12,962 46.0% 0 0.0% 28,192
2018-11-06 IL06Sean Casten (D) 91,991 54.9% Peter Roskam* (R) 75,483 45.1% 0 0.0% 167,474
2018-11-06 IL08Raja Krishnamoorthi* (D) 49,006 63.0% J.D. Diganvker (R) 28,758 37.0% 0 0.0% 77,764
2018-11-06 IL11Bill Foster* (D) 50,882 61.3% Nick Stella (R) 32,078 38.7% 0 0.0% 82,960
2018-11-06 IL14Lauren Underwood (D) 4,176 63.0% Randy Hultgren* (R) 2,455 37.0% 0 0.0% 6,631
County Total for 2018-11-06:   363,558
2016-11-08 IL03Daniel Lipinski* (D) 521 100.0% 0 0.0% 521
2016-11-08 IL05Vince Kolber (R) 16,004 51.0% Mike Quigley* (D) 14,363 45.7% 1,041 3.3% 31,408
2016-11-08 IL06Peter Roskam* (R) 108,716 58.9% Amanda Howland (D) 75,968 41.1% 0 0.0% 184,684
2016-11-08 IL08Raja Krishnamoorthi (D) 53,297 54.0% Pete DiCianni (R) 45,355 46.0% 0 0.0% 98,652
2016-11-08 IL11Bill Foster* (D) 52,606 54.3% Tonia Khouri (R) 44,235 45.7% 0 0.0% 96,841
2016-11-08 IL14Jim Walz (D) 3,956 51.7% Randy Hultgren* (R) 3,692 48.3% 0 0.0% 7,648
County Total for 2016-11-08:   419,754
2014-11-04 IL03Daniel Lipinski* (D) 216 54.5% Sharon Brannigan (R) 180 45.5% 0 0.0% 396
2014-11-04 IL05Vince Kolber (R) 12,626 56.5% Mike Quigley* (D) 8,696 38.9% 1,013 4.5% 22,335
2014-11-04 IL06Peter Roskam* (R) 85,861 66.4% Michael Mason (D) 43,376 33.6% 0 0.0% 129,237
2014-11-04 IL08Tammy Duckworth* (D) 33,042 53.2% Larry Kaifesh (R) 29,021 46.8% 0 0.0% 62,063
2014-11-04 IL11Darlene Senger (R) 33,492 52.3% Bill Foster* (D) 30,552 47.7% 0 0.0% 64,044
2014-11-04 IL14Randy Hultgren* (R) 2,761 57.2% Dennis Anderson (D) 2,067 42.8% 0 0.0% 4,828
County Total for 2014-11-04:   282,903
2012-11-06 IL03Daniel Lipinski* (D) 340 57.9% Richard Grabowski (R) 247 42.1% 0 0.0% 587
2012-11-06 IL05Dan Schmitt (R) 15,883 54.2% Mike Quigley* (D) 12,262 41.9% 1,141 3.9% 29,286
2012-11-06 IL06Peter Roskam* (R) 101,912 59.0% Leslie Coolidge (D) 70,802 41.0% 0 0.0% 172,714
2012-11-06 IL08Tammy Duckworth (D) 46,855 52.4% Joe Walsh* (R) 42,557 47.6% 0 0.0% 89,412
2012-11-06 IL11Bill Foster* (D) 47,093 51.9% Judy Biggert* (R) 43,682 48.1% 0 0.0% 90,775
2012-11-06 IL14Dennis Anderson (D) 3,500 50.2% Randy Hultgren* (R) 3,466 49.8% 0 0.0% 6,966
County Total for 2012-11-06:   389,740
2010-11-02 IL06Peter Roskam* (R) 92,749 64.2% Benjamin Lowe (D) 51,708 35.8% 0 0.0% 144,457
2010-11-02 IL13Judy Biggert* (R) 79,821 64.3% Scott Harper (D) 44,367 35.7% 0 0.0% 124,188
2010-11-02 IL14Randy Hultgren (R) 7,672 51.9% Bill Foster* (D) 6,563 44.4% 546 3.7% 14,781
County Total for 2010-11-02:   283,426
2008-11-04 IL06Peter Roskam* (R) 120,197 59.0% Jill Morgenthaler (D) 83,634 41.0% 0 0.0% 203,831
2008-11-04 IL13Judy Biggert* (R) 94,666 54.4% Scott Harper (D) 73,859 42.4% 5,558 3.2% 174,083
2008-11-04 IL14Bill Foster* (D) 11,341 55.0% Jim Oberweis (R) 9,284 45.0% 0 0.0% 20,625
County Total for 2008-11-04:   398,539
2008-03-08 sp IL14Bill Foster (D) 3,301 50.6% Jim Oberweis (R) 3,221 49.4% 0 0.0% 6,522
County Total for 2008-03-08:   6,522
2006-11-07 IL06Peter Roskam (R) 74,806 52.4% Tammy Duckworth (D) 68,028 47.6% 3 0.0% 142,837
2006-11-07 IL13Judy Biggert* (R) 65,984 60.3% Joseph Shannon (D) 43,425 39.7% 2 0.0% 109,411
2006-11-07 IL14Dennis Hastert* (R) 8,054 61.3% John Laesch (D) 5,076 38.7% 0 0.0% 13,130
County Total for 2006-11-07:   265,378
2004-11-02 IL06Henry Hyde* (R) 114,790 56.7% Christine Cegelis (D) 87,769 43.3% 0 0.0% 202,559
2004-11-02 IL13Judy Biggert* (R) 111,563 66.8% Gloria Andersen (D) 55,449 33.2% 0 0.0% 167,012
2004-11-02 IL14Dennis Hastert* (R) 13,538 69.0% Ruben Zamora (D) 6,091 31.0% 0 0.0% 19,629
County Total for 2004-11-02:   389,200
2002-11-05 IL06Henry Hyde* (R) 92,403 65.8% Tom Berry (D) 48,005 34.2% 0 0.0% 140,408
2002-11-05 IL13Judy Biggert* (R) 82,483 72.8% Tom Mason (D) 30,874 27.2% 0 0.0% 113,357
2002-11-05 IL14Dennis Hastert* (R) 10,152 76.2% Laurence Quick (D) 3,177 23.8% 0 0.0% 13,329
County Total for 2002-11-05:   267,094
2000-11-07 IL06Henry Hyde* (R) 91,083 58.8% Brent Christensen (D) 63,870 41.2% 0 0.0% 154,953
2000-11-07 IL13Judy Biggert* (R) 108,662 68.9% Thomas Mason (D) 49,055 31.1% 0 0.0% 157,717
2000-11-07 IL14Dennis Hastert* (R) 30,088 71.9% Vern Deljonson (D) 11,761 28.1% 0 0.0% 41,849
County Total for 2000-11-07:   354,519
1998-11-03 IL06Henry Hyde* (R) 74,863 67.8% Thomas Cramer (D) 32,473 29.4% 3,131 2.8% 110,467
1998-11-03 IL13Judy Biggert (R) 71,545 65.1% Susan Hynes (D) 38,280 34.9% 0 0.0% 109,825
1998-11-03 IL14Dennis Hastert* (R) 20,116 70.1% Robert Cozzi (D) 8,580 29.9% 0 0.0% 28,696
County Total for 1998-11-03:   248,988
1996-11-05 IL06Henry Hyde* (R) 86,569 64.8% Stephen de la Rosa (D) 43,786 32.8% 3,157 2.4% 133,512
1996-11-05 IL13Harris Fawell* (R) 82,692 64.0% Susan Hynes (D) 46,415 36.0% 0 0.0% 129,107
1996-11-05 IL14Dennis Hastert* (R) 20,726 63.3% Doug Mains (D) 12,009 36.7% 0 0.0% 32,735
County Total for 1996-11-05:   295,354
1994-11-08 IL06Henry Hyde* (R) 76,220 74.3% Tom Berry (D) 23,325 22.7% 3,076 3.0% 102,621
1994-11-08 IL13Harris Fawell* (R) 76,265 77.1% William Riley (D) 22,594 22.9% 0 0.0% 98,859
1994-11-08 IL14Dennis Hastert* (R) 18,899 78.0% Steve Denari (D) 5,324 22.0% 0 0.0% 24,223
County Total for 1994-11-08:   225,703
1992-11-03 IL13Harris Fawell* (R) 111,362 72.2% Dennis Temple (D) 42,933 27.8% 13 0.0% 154,308
1992-11-03 IL14Dennis Hastert* (R) 26,891 71.8% Jonathan Reich (D) 10,533 28.1% 4 0.0% 37,428
County Total for 1992-11-03:   191,736
*: incumbent           sp: special election           RO: runoff election

Voter Registration Data for DuPage County, IL

Party registration is not used in this state, however as of 2022 registrations in DuPage County, IL were estimated to be 26% Republican and 32% Democrat.

YearTotalRepublicanDemocratOtherR/D EdgeR/D Edge %VAPOP %
2022 616,283 0 0.0% 0 0.0% 616,283 100.0% n/a n/a 87%
2020 641,503 0 0.0% 0 0.0% 641,503 100.0% n/a n/a 90%
2018 640,622 0 0.0% 0 0.0% 640,622 100.0% n/a n/a 91%
2016 613,489 0 0.0% 0 0.0% 613,489 100.0% n/a n/a 87%
2012 560,718 0 0.0% 0 0.0% 560,718 100.0% n/a n/a 81%
2010 558,929 0 0.0% 0 0.0% 558,929 100.0% n/a n/a 81%
2008 551,280 0 0.0% 0 0.0% 551,280 100.0% n/a n/a 81%
2006 529,726 0 0.0% 0 0.0% 529,726 100.0% n/a n/a 78%
2004 530,732 0 0.0% 0 0.0% 530,732 100.0% n/a n/a 79%
2000 482,789 0 0.0% 0 0.0% 482,789 100.0% n/a n/a 73%
1994 393,599 0 0.0% 0 0.0% 393,599 100.0% n/a n/a 64%
1986 341,177 0 0.0% 0 0.0% 341,177 100.0% n/a n/a 64%
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.