1978Final results
1978 election for Illinois's 9th District
U.S. House · Illinois
Sidney Yates (D) won with 75.3% of the vote, defeating John M. Collins (R) by 50.7 points.
Sidney YatesDemocrat · winner
75.3%87,543
John M. CollinsRepublican
24.7%28,673
116,217 votes
Source: MIT Election Data and Science LabUpdated Sep 30, 2026, 7:25 AM ET
The seat over time
D − R margin in this seat's races around 1978
Races before and after
Source: MIT Election Data and Science LabUpdated Sep 30, 2026, 7:25 AM ET