IL-01 elected a Democrat in 2018.

D+53.7 on 257,885 certified votes. Below: the 2018 result and this district's margin across every cycle on record.

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IL-01 — 2018 result

Source: MIT Election Data + Science Lab, US House returns (party-classified by literal ballot party).

Democratic (D)

189,560

73.5%

Republican (R)

50,960

19.8%

All others

17,365

6.7%

Margin

D+53.7

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Margin history

IL-01 across every cycle on record. Each year links to its district page.

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Year	Won	Margin	Votes
2024	D	+31.7%	316,507
2022	D	+34.1%	237,425
2020	D	+47.6%	325,123
2018	D	+53.7%	257,885
2016	D	+48.2%	315,862
2014	D	+46.2%	222,017
2012	D	+47.6%	320,844
2010	D	+64.5%	184,386
2008	D	+71.7%	271,397
2006	D	+68.1%	174,427
2004	D	+69.7%	249,949
2002	D	+65.0%	183,656
2000	D	+75.6%	196,186
1998	D	+76.5%	174,365
1996	D	+73.0%	203,113
1994	D	+51.5%	148,512
1992	D	+65.6%	252,711
1990	D	+87.5%	107,598
1988	D	+92.1%	170,878
1986	D	+92.8%	126,948
1984	D	+95.6%	185,534
1982	D	+94.6%	177,462
1980	D	+91.0%	125,223
1978	D	+17.3%	81,279
1976	D	+84.9%	137,193