2010Final results
2010 election for Illinois Representative District 42
Illinois House of Representatives · Illinois
Sandra M. Pihos (R) won with 64.1% of the vote, defeating Kathryn F. Vlahos (D) by 28.3 points.
Sandra M. PihosRepublican · winner · incumbent
64.1%23,007
Kathryn F. VlahosDemocrat
35.9%12,868
35,875 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 2010
Races before and after
Source: Harvard Dataverse / Carl KlarnerUpdated Sep 30, 2026, 7:29 AM ET