United States Senate – GOP Hold
Charles H. Percy (R-inc) 1,698,711 – 53.34%
Alex Seith (D) 1,448,187 – 45.47%
Bruce Lee Green (L) 16,320 – 0.51%
Patricia Grogan (SW) 15,922 – 0.50%
Gerald Rose (SL) 5,465 – 0.17%
Write-Ins 159 – 0.00%
Total Votes 3,184,764 – 100.00%
United States House of Representatives – District 1 – DEM Hold
Bennett M. Stewart (D) 47,581 – 58.54%
A. A. Rayner, Jr. (R) 33,540 – 41.27%
Write-Ins 158 – 0.19%
Total Votes 81,279 – 100.00%
United States House of Representatives – District 2 – DEM Hold
Morgan F. Murphy (D-inc) 80,906 – 86.00%
James P. Wognum (R) 11,104 – 11.80%
Carl Stanley Holmes (I) 2,064 – 2.19%
Write-Ins 3 – 0.00%
Total Votes 94,077 – 100.00%
United States House of Representatives – District 3 – DEM Hold
Marty Russo (D-inc) 95,701 – 65.19%
Robert L. Dunne (R) 51,098 – 34.81%
Write-Ins 1 – 0.00%
Total Votes 146,800 – 100.00%
United States House of Representatives – District 4 – GOP Hold
Ed Derwinski (R-inc) 94,435 – 66.87%
Andrew Thomas (D) 46,788 – 33.13%
Write-Ins 6 – 0.00%
Total Votes 141,229 – 100.00%
United States House of Representatives – District 5 – DEM Hold
John G. Fary (D-inc) 98,702 – 84.00%
Joseph A. Barracca (R) 18,802 – 16.00%
Write-Ins 2 – 0.00%
Total Votes 117,506 – 100.00%
United States House of Representatives – District 6 – GOP Hold
Henry Hyde (R-inc) 87,193 – 66.19%
Jeanne P. Quinn (D) 44,543 – 33.81%
Write-Ins 1 – 0.00%
Total Votes 131,737 – 100.00%
United States House of Representatives – District 7 – DEM Hold
Cardiss Collins (D-inc) 64,716 – 86.30%
James C. Holt (R) 10,273 – 13.70%
Total Votes 74,989 – 100.00%
United States House of Representatives – District 8 – DEM Hold
Dan Rostenkowski (D-inc) 81,457 – 85.96%
Carl C. LoDico (R) 13,302 – 14.04%
Write-Ins 3 – 0.00%
Total Votes 94,762 – 100.00%
United States House of Representatives – District 9 – DEM Hold
Sidney R. Yates (D-inc) 87,543 – 75.33%
John M. Collins (R) 28,673 – 24.67%
Write-Ins 1 – 0.00%
Total Votes 116,217 – 100.00%
United States House of Representatives – District 10 – DEM Hold
Abner J. Mikva (D-inc) 89,479 – 50.18%
John E. Porter (R) 88,829 – 49.82%
Write-Ins 1 – 0.00%
Total Votes 178,309 – 100.00%
United States House of Representatives – District 11 – DEM Hold
Frank Annunzio (D-inc) 112,365 – 73.72%
John Hoeger (R) 40,044 – 26.27%
Write-Ins 3 – 0.00%
Total Votes 152,412 – 100.00%
United States House of Representatives – District 12 – GOP Hold
Phil Crane (R-inc) 110,503 – 79.54%
Gilbert Bogen (D) 28,424 – 20.46%
Write-Ins 8 – 0.01%
Total Votes 138,935 – 100.00%
United States House of Representatives – District 13 – GOP Hold
Robert McClory (R-inc) 64,060 – 61.16%
Frederick J. Steffen (D) 40,675 – 38.83%
Write-Ins 3 – 0.00%
Total Votes 104,738 – 100.00%
United States House of Representatives – District 14 – GOP Hold
John N. Erlenborn (R-inc) 118,741 – 75.07%
James A. Romanyak (D) 39,438 – 24.93%
Total Votes 158,179 – 100.00%
United States House of Representatives – District 15 – GOP Hold
Tom Corcoran (R-inc) 80,856 – 62.38%
Tim Lee Hall (D) 48,756 – 37.62%
Total Votes 129,612 – 100.00%
United States House of Representatives – District 16 – GOP Hold
John B. Anderson (R-inc) 76,752 – 65.43%
Ernest W. Dahlin (D) 40,471 – 34.50%
Write-Ins 86 – 0.07%
Total Votes 117,309 – 100.00%
United States House of Representatives – District 17 – GOP Hold
George M. O’Brien (R-inc) – 94,375 – 70.62%
Clifford J. Sinclair (D) 39,260 – 29.38%
Total Votes 133,635 – 100.00%
United States House of Representatives – District 18 – GOP Hold
Robert H. Michel (R-inc) 85,973 – 65.87%
Virgil R. Grunkmeyer (D) 44,527 – 34.12%
Write-Ins 14 – 0.01%
Total Votes 130,514 – 100.00%
United States House of Representatives – District 19 – GOP Hold
Tom Railsback (R-inc) 89,770 – 99.98%
Write-Ins 20 – 0.02%
Total Votes 89,790 – 100.00%
United States House of Representatives – District 20 – GOP Hold
Paul Findley (R-inc) 111,054 – 69.64%
Victor Roberts (D) 48,426 – 30.36%
Total Votes 159,480 – 100.00%
United States House of Representatives – District 21 – GOP Hold
Edward Rell Madigan (R-inc) 97,473 – 78.27%
Ken Baughman (D) 27,054 – 21.73%
Total Votes 124,527 – 100.00%
United States House of Representatives – District 22 – GOP Gain
Daniel B. Crane (R) 86,051 – 53.99%
Terry L. Bruce (D) 73,331 – 46.01%
Write-Ins 1 – 0.00%
Total Votes 159,383 – 100.00%
United States House of Representatives – District 23 – DEM Hold
Melvin Price (D-inc) 74,247 – 74.17%
Daniel J. Stack (R) 25,858 – 25.83%
Total Votes 100,105 – 100.00%
United States House of Representatives – District 24 – DEM Hold
Paul Simon (D-inc) 110,298 – 65.63%
John T. Anderson (R) 57,763 – 34.37%
Total Votes 168,061 – 100.00%