IL-03 elected a Democrat in 2018.

D+47.1 on 223,334 certified votes. Below: the 2018 result and this district's margin across every cycle on record.

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IL-03 — 2018 result

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

Democratic (D)

163,053

73.0%

Republican (R)

57,885

25.9%

All others

2,396

1.1%

Margin

D+47.1

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Margin history

IL-03 across every cycle on record. Each year links to its district page.

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Year	Won	Margin	Votes
2024	D	+34.6%	259,908
2022	D	+37.0%	177,759
2020	D	+12.8%	306,848
2018	D	+47.1%	223,334
2016	D	+100.0%	225,411
2014	D	+29.1%	180,855
2012	D	+37.0%	246,398
2010	D	+45.4%	166,627
2008	D	+51.9%	235,524
2006	D	+54.2%	165,722
2004	D	+47.5%	229,956
2002	D	+100.0%	156,042
2000	D	+51.2%	192,503
1998	D	+45.0%	159,899
1996	D	+33.3%	209,916
1994	D	+8.3%	170,516
1992	D	+27.0%	255,293
1990	D	+41.9%	155,811
1988	D	+24.5%	212,292
1986	D	+32.4%	155,567
1984	D	+28.8%	222,582
1982	D	+48.0%	185,659
1980	D	+37.8%	199,240
1978	D	+30.4%	146,800
1976	D	+18.4%	196,365