1974Final resultsIncumbent defeated
1974 election for Illinois Representative District 17
Illinois House of Representatives · Illinois
3 seats: Thaddeus Lechowicz (Ind), Michael S. Holewinski (D), John F. Leon (D) won.
3 seatsThaddeus LechowiczIndependent · winner · incumbent
28.8%39,853
Michael S. HolewinskiDemocrat · winner
25.5%35,216
John F. LeonDemocrat · winner · incumbent
21.7%30,030
Jacob John WolfRepublican · incumbent
14.7%20,310
Edward T. PloskiRepublican
9.2%12,760
138,169 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 1974
Races before and after
Source: Harvard Dataverse / Carl KlarnerUpdated Sep 30, 2026, 7:29 AM ET