1972Final results
1972 election for Indiana Senate District 18
Indiana State Senate · Indiana
Leo Sullivan (R) won with 50.6% of the vote, defeating Robert E. Peterson (D) by 1.1 points.
Leo SullivanRepublican · winner · incumbent
50.6%21,820
Robert E. PetersonDemocrat
49.4%21,331
43,151 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 1972
Races before and after
Source: Harvard Dataverse / Carl KlarnerUpdated Sep 30, 2026, 7:29 AM ET