1970Final results
1970 election for Illinois Legislative District 18
Illinois State Senate · Illinois
Philip J. Rock (D) won with 81.7% of the vote, defeating Marie A. Pedersen (R) by 63.5 points.
Philip J. RockDemocrat · winner
81.7%33,001
Marie A. PedersenRepublican
18.3%7,375
40,376 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 1970
Races before and after
Source: Harvard Dataverse / Carl KlarnerUpdated Sep 30, 2026, 7:29 AM ET