Illinois sent 10 Democrats and 14 Republicans to the US House in 1980.

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

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Illinois — 1980 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	+91.0%	Harold Washington	125,223
IL-02	D	+76.3%	Gus Savage	147,302
IL-03	D	+37.8%	Martin A Russo	199,240
IL-04	R	−35.9%	Edward J Derwinski	224,192
IL-05	D	+59.3%	John G Fary	133,279
IL-06	R	−33.9%	Henry J Hyde	184,550
IL-07	D	+70.2%	Cardiss Collins	94,097
IL-08	D	+69.3%	Dan Rostenkowski	116,373
IL-09	D	+46.2%	Sidney R Yates	145,788
IL-10	R	−21.5%	John Edward Porter	226,733
IL-11	D	+39.6%	Frank Annunzio	173,587
IL-12	R	−48.2%	Philip M Crane	249,818
IL-13	R	−43.3%	Robert McClory	183,458
IL-14	R	−53.6%	John N Erlenborn	263,828
IL-15	R	−53.5%	Tom Corcoran	196,619
IL-16	R	−34.8%	Lynn Martin	197,147
IL-17	R	−31.7%	George M O'Brien	191,111
IL-18	R	−24.3%	Robert H Michel	202,043
IL-19	R	−46.7%	Tom Railsback	194,369
IL-20	R	−12.0%	Paul Findley	220,377
IL-21	R	−35.1%	Edward R Madigan	195,662
IL-22	R	−37.7%	Daniel B Crane	212,079
IL-23	D	+28.8%	Melvin Price	167,430
IL-24	D	+0.9%	Paul Simon	228,296