1986Final results
1986 election for Illinois Representative District 83
Illinois House of Representatives · Illinois
Leroy Vanduyne (D) won with 55.6% of the vote, defeating Joseph M. Jenco (R) by 11.2 points.
Leroy VanduyneDemocrat · winner · incumbent
55.6%12,600
Joseph M. JencoRepublican
44.4%10,070
22,670 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