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United States · Election results history · 2018 House · Illinois
Election 2018 Results

Each election opens in its own mode: the forecast before the votes are counted, the live count while races are still too close to call, and the results once every race is decided.

2018 US House elections in Illinois

Illinois elected 18 members of the House in 2018: Democrats won 13 seats and Republicans 5.

The closest was the 13th district, decided by 0.8 points: Rodney Davis (Republican) beat Betsy Dirksen Londrigan (Democrat), 50.4% to 49.6%, a margin of 0.8 points and 2,058 votes.

In the House vote by county, Republicans led in 77 of the 102 counties and Democrats in 25. The largest, Cook, cast 1,746,179 votes and went to the Democrat by 59.4 points. The closest was Alexander, where 15 votes separated the two parties.

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Early projection, based on early and incomplete polling: the likely matchups, each weighted by the betting markets' odds of both nominations, not a result. Each county is its 2024 presidential margin moved by its state's projected swing; set a national vote and every state, district and county moves by the same amount from our projection. Colours run in 100 steps from a safe Republican to a safe Democratic margin. Boundaries: US Census Bureau.

Every district

DistrictDemocratVotesRepublicanVotesOthersMargin
1 Bobby L. Rush189,560 (73.5%) Jimmy Lee Tillman, II50,960 (19.8%) 17,365 D+53.7
2 Robin Kelly190,684 (81.1%) David Merkle44,567 (18.9%) D+62.1
3 Daniel William Lipinski163,053 (73.0%) Arthur J. Jones57,885 (25.9%) 2,396 D+47.1
4 Jesus "Chuy" Garcia143,895 (86.6%) Mark Wayne Lorch22,294 (13.4%) D+73.2
5 Mike Quigley213,992 (76.7%) Tom Hanson65,134 (23.3%) 5 D+53.3
6 Sean Casten169,001 (53.6%) Peter J. Roskam146,445 (46.4%) D+7.2
7 Danny K. Davis215,746 (87.6%) Craig Cameron30,497 (12.4%) D+75.2
8 Raja Krishnamoorthi130,054 (66.0%) Jitendra "Jd" Diganvker67,073 (34.0%) D+32.0
9 Janice D. Schakowsky213,368 (73.5%) John D. Elleson76,983 (26.5%) D+47.0
10 Brad Schneider156,540 (65.6%) Douglas R. Bennett82,124 (34.4%) D+31.2
11 Bill Foster145,407 (63.8%) Nick Stella82,358 (36.2%) D+27.7
12 Brendan Kelly118,724 (45.4%) Mike Bost134,884 (51.6%) 7,935 R+6.2
13 Betsy Dirksen Londrigan134,458 (49.6%) Rodney Davis136,516 (50.4%) 7 R+0.8
14 Lauren Underwood156,035 (52.5%) Randall M. "Randy" Hultgren141,164 (47.5%) D+5.0
15 Kevin Gaither74,309 (29.1%) John M. Shimkus181,294 (70.9%) 5 R+41.9
16 Sara Dady104,569 (40.9%) Adam Kinzinger151,254 (59.1%) 2 R+18.3
17 Cheri Bustos142,659 (62.1%) William W. "Bill" Fawell87,090 (37.9%) D+24.2
18 Junius Rodriguez95,486 (32.8%) Darin Lahood195,927 (67.2%) R+34.5

The House vote in every county

CountyDemocratRepublicanOthersTotalMargin
Cook 1,381,905 79.1% 344,937 19.8% 19,337 1,746,179 D+59.4
DuPage 211,635 57.2% 151,919 41.0% 6,665 370,219 D+16.1
Lake 154,399 61.4% 97,170 38.6% 251,569 D+22.7
Will 138,133 56.1% 102,856 41.8% 5,149 246,138 D+14.3
Kane 96,570 56.9% 73,262 43.1% 169,832 D+13.7
McHenry 59,873 51.3% 56,728 48.7% 116,601 D+2.7
Madison 47,567 45.7% 54,820 52.7% 1,626 104,013 R+7.0
St. Clair 54,108 54.3% 41,387 41.6% 4,095 99,590 D+12.8
Winnebago 48,710 50.7% 46,936 48.8% 502 96,148 D+1.8
Sangamon 36,533 42.6% 49,205 57.3% 84 85,822 R+14.8
Champaign 47,195 60.0% 31,515 40.0% 78,710 D+19.9
McLean 31,232 46.1% 36,168 53.4% 393 67,793 R+7.3
Peoria 33,926 52.2% 31,089 47.8% 65,015 D+4.4
Tazewell 19,984 38.5% 31,856 61.5% 51,840 R+22.9
Rock Island 32,765 63.9% 17,992 35.1% 526 51,283 D+28.8
Kendall 24,484 54.6% 20,361 45.4% 44,845 D+9.2
LaSalle 17,241 43.1% 22,725 56.9% 39,966 R+13.7
Macon 16,242 41.4% 22,945 58.4% 77 39,264 R+17.1
Kankakee 16,363 44.2% 20,032 54.1% 616 37,011 R+9.9
DeKalb 19,739 54.4% 16,521 45.6% 36,260 D+8.9
Williamson 8,996 32.8% 17,728 64.6% 705 27,429 R+31.8
Adams 5,972 24.5% 18,421 75.5% 24,393 R+51.0
Vermilion 8,446 36.2% 14,675 62.8% 241 23,362 R+26.7
Whiteside 13,246 61.0% 8,160 37.6% 314 21,720 D+23.4
Jackson 10,148 49.1% 9,879 47.8% 657 20,684 D+1.3
Grundy 6,904 35.1% 12,406 63.2% 334 19,644 R+28.0
Henry 10,408 53.5% 9,034 46.5% 19,442 D+7.1
Ogle 6,980 36.5% 12,147 63.5% 19,127 R+27.0
Macoupin 7,031 38.1% 10,969 59.4% 452 18,452 R+21.3
Boone 7,465 41.1% 10,530 58.0% 173 18,168 R+16.9
Knox 11,203 62.4% 6,671 37.1% 84 17,958 D+25.2
Coles 6,520 38.4% 10,464 61.6% 16,984 R+23.2
Stephenson 8,658 52.9% 7,696 47.1% 16,354 D+5.9
Woodford 4,576 28.2% 11,656 71.8% 16,232 R+43.6
Monroe 5,593 35.5% 9,735 61.8% 421 15,749 R+26.3
Franklin 5,131 32.8% 9,958 63.7% 536 15,625 R+30.9
Effingham 3,162 22.1% 11,143 77.9% 14,305 R+55.8
Clinton 3,678 25.8% 10,403 72.9% 188 14,269 R+47.1
Jefferson 4,554 32.5% 9,088 64.9% 360 14,002 R+32.4
Bureau 5,234 38.4% 8,408 61.6% 13,642 R+23.3
Christian 3,467 26.6% 9,452 72.6% 106 13,025 R+46.0
Marion 3,917 30.6% 8,732 68.3% 135 12,784 R+37.7
Lee 5,210 40.9% 7,397 58.1% 135 12,742 R+17.2
Fulton 7,870 61.9% 4,719 37.1% 134 12,723 D+24.8
Randolph 4,317 34.6% 7,672 61.6% 474 12,463 R+26.9
Livingston 3,286 26.8% 8,818 71.9% 155 12,259 R+45.1
Morgan 3,342 28.2% 8,351 70.4% 176 11,869 R+42.2
Montgomery 3,961 34.7% 7,438 65.2% 10 11,409 R+30.5
Iroquois 1,875 18.1% 8,401 80.9% 110 10,386 R+62.8
McDonough 4,002 38.6% 6,171 59.5% 190 10,363 R+20.9
Logan 2,443 24.4% 7,574 75.6% 10,017 R+51.2
Saline 2,711 27.8% 6,676 68.3% 381 9,768 R+40.6
Shelby 2,344 25.0% 6,837 72.8% 209 9,390 R+47.8
Jo Daviess 5,111 55.3% 4,124 44.7% 9,235 D+10.7
Jersey 2,786 32.0% 5,917 67.9% 9 8,712 R+35.9
Perry 2,634 30.4% 5,833 67.3% 205 8,672 R+36.9
Fayette 1,897 23.7% 5,950 74.3% 164 8,011 R+50.6
Piatt 2,631 34.0% 4,985 64.5% 114 7,730 R+30.5
Union 2,417 31.4% 4,997 65.0% 279 7,693 R+33.5
Crawford 2,094 29.8% 4,770 67.9% 157 7,021 R+38.1
Mercer 3,967 56.6% 3,037 43.4% 7,004 D+13.3
Hancock 1,928 27.6% 5,062 72.4% 6,990 R+44.8
Bond 2,255 33.5% 4,298 63.9% 170 6,723 R+30.4
Pike 1,392 20.8% 5,050 75.5% 251 6,693 R+54.7
Douglas 1,627 25.6% 4,738 74.4% 6,365 R+48.9
De Witt 1,816 28.9% 4,377 69.7% 89 6,282 R+40.8
Edgar 1,734 27.7% 4,270 68.2% 260 6,264 R+40.5
Washington 1,399 22.5% 4,634 74.7% 172 6,205 R+52.1
Richland 1,597 25.8% 4,438 71.7% 155 6,190 R+45.9
Warren 3,353 54.3% 2,749 44.5% 73 6,175 D+9.8
Clark 1,821 29.8% 4,267 69.9% 16 6,104 R+40.1
Wayne 1,048 17.3% 4,908 80.9% 109 6,065 R+63.6
Carroll 3,169 52.5% 2,798 46.3% 72 6,039 D+6.1
White 1,445 24.1% 4,410 73.4% 151 6,006 R+49.4
Massac 1,443 26.2% 3,937 71.5% 126 5,506 R+45.3
Menard 1,323 24.7% 4,033 75.3% 5,356 R+50.6
Johnson 1,223 22.9% 3,948 73.9% 171 5,342 R+51.0
Mason 1,633 31.2% 3,602 68.8% 5,235 R+37.6
Moultrie 1,640 32.0% 3,487 68.0% 5,127 R+36.0
Ford 1,051 20.8% 3,916 77.4% 93 5,060 R+56.6
Clay 1,036 21.4% 3,803 78.6% 4,839 R+57.2
Marshall 1,348 28.5% 3,375 71.5% 4,723 R+42.9
Cass 1,314 28.1% 3,195 68.2% 173 4,682 R+40.2
Jasper 1,099 24.0% 3,311 72.3% 167 4,577 R+48.3
Greene 1,335 30.1% 2,985 67.2% 120 4,440 R+37.2
Cumberland 1,058 24.0% 3,252 73.9% 90 4,400 R+49.9
Lawrence 1,291 30.0% 3,007 70.0% 4,298 R+39.9
Wabash 1,040 26.1% 2,943 73.9% 3,983 R+47.8
Hamilton 862 25.1% 2,579 74.9% 3,441 R+49.9
Schuyler 862 27.1% 2,242 70.6% 72 3,176 R+43.5
Henderson 1,386 52.0% 1,278 48.0% 2,664 D+4.1
Putnam 1,094 42.4% 1,487 57.6% 2,581 R+15.2
Edwards 419 17.3% 1,999 82.7% 2,418 R+65.3
Pulaski 938 38.9% 1,442 59.7% 34 2,414 R+20.9
Calhoun 811 35.9% 1,447 64.1% 1 2,259 R+28.2
Alexander 1,099 49.2% 1,084 48.5% 51 2,234 D+0.7
Scott 410 19.5% 1,630 77.7% 58 2,098 R+58.2
Gallatin 714 34.4% 1,360 65.6% 2,074 R+31.1
Stark 559 27.2% 1,497 72.8% 2,056 R+45.6
Brown 350 18.5% 1,541 81.5% 1,891 R+63.0
Pope 396 21.9% 1,373 75.8% 43 1,812 R+53.9
Hardin 431 25.6% 1,251 74.4% 1,682 R+48.8

Margin: the Democrat's share of all votes minus the Republican's. Sources and how the results were checked.

Illinois in every House election we hold

YearSeatsHouse vote
2024 D 14, R 3 D+5.8
2022 D 14, R 3 D+12.4
2020 D 13, R 5 D+16.0
2018 D 13, R 5 D+22.1
2016 D 11, R 7 D+7.9
2014 D 10, R 8 D+2.8
2012 D 12, R 6 D+10.6
2010 D 8, R 11 D+4.2
2008 D 12, R 7 D+23.2
2006 D 10, R 9 D+15.8
2004 D 10, R 9 D+8.1
2002 D 9, R 10 D+2.4
2000 D 10, R 10 D+12.4
1998 D 10, R 10 R+1.8
1996 D 10, R 10 D+11.0
1994 D 10, R 10 R+3.8
1992 D 12, R 8 D+12.0
1990 D 15, R 7 D+9.7