1980Final results
1980 election for Idaho Legislative District 12
Idaho State Senate · Idaho
Leon H. Swenson (R) won with 52.8% of the vote, defeating Terry Reilly (D) by 5.7 points.
Leon H. SwensonRepublican · winner · incumbent
52.8%5,325
Terry ReillyDemocrat
47.2%4,755
10,080 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 1980
Races before and after
Source: Harvard Dataverse / Carl KlarnerUpdated Sep 30, 2026, 7:29 AM ET