1976Final results
1976 election for Illinois Legislative District 12
Illinois State Senate · Illinois
John Merlo (D) won with 66.3% of the vote, defeating Catherine Rondinelli (R) by 32.6 points.
John MerloDemocrat · winner
66.3%38,244
Catherine RondinelliRepublican
33.7%19,432
57,676 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 1976
Races before and after
Source: Harvard Dataverse / Carl KlarnerUpdated Sep 30, 2026, 7:29 AM ET