2000Final results
2000 election for Illinois Representative District 43
Illinois House of Representatives · Illinois
William A. Oconnor (R) won with 53.9% of the vote, defeating John Lamantia (D) by 7.9 points.
William A. OconnorRepublican · winner · incumbent
53.9%17,713
John LamantiaDemocrat
46.1%15,121
32,834 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 2000
Races before and after
Source: Harvard Dataverse / Carl KlarnerUpdated Sep 30, 2026, 7:29 AM ET