Illinois sent 8 Democrats and 11 Republicans to the US House in 2010.

19 districts. Each row shows the winning party, margin, and member elected. Vote counts are the certified district totals.

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Illinois — 2010 House districts

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

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District	Won	Margin	Member elected	Votes
IL-01	D	+64.5%	Bobby L Rush	184,386
IL-02	D	+66.7%	Jesse L Jackson JR	187,113
IL-03	D	+45.4%	Daniel Lipinski	166,627
IL-04	D	+63.0%	Luis V Gutierrez	81,792
IL-05	D	+45.2%	Mike Quigley	153,435
IL-06	R	−27.3%	Peter J Roskam	179,835
IL-07	D	+65.4%	Danny K Davis	183,849
IL-08	R	−0.1%	Joe Walsh	202,435
IL-09	D	+35.2%	Janice D Scakowsky	177,207
IL-10	R	−2.2%	Robert Dold	215,232
IL-11	R	−14.7%	Adam Kinzinger	225,127
IL-12	D	+23.3%	Jerry F Costello	202,705
IL-13	R	−27.6%	Judy Biggert	238,413
IL-14	R	−6.3%	Randall M \"Randy\" Hultgren	219,013
IL-15	R	−28.6%	Timothy V Johnson	212,863
IL-16	R	−34.0%	Donald A Manzullo	212,761
IL-17	R	−9.6%	Bobby Schilling	198,898
IL-18	R	−43.3%	Aaron Schock	221,170
IL-19	R	−42.4%	John Shimkus	233,298