1986Final results
1986 election for Illinois Legislative District 42
Illinois State Senate · Illinois
Thomas A. Dunn (D) won with 54.6% of the vote, defeating John Bourg (R) by 9.2 points.
Thomas A. DunnDemocrat · winner
54.6%25,414
John BourgRepublican
45.4%21,144
46,558 votes
Source: Harvard Dataverse / Carl KlarnerUpdated Sep 30, 2026, 7:29 AM ET
The seat over time
D − R margin in this seat's races around 1986
Races before and after
Source: Harvard Dataverse / Carl KlarnerUpdated Sep 30, 2026, 7:29 AM ET