2012Final results
2012 election for Iowa Senate District 40
Iowa State Senate · Iowa
Ken Rozenboom (R) won with 60.1% of the vote, defeating Tim Tripp (D) by 20.3 points.
Ken RozenboomRepublican · winner
60.1%17,628
Tim TrippDemocrat
39.8%11,670
29,322 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 2012
Races before and after
Source: Harvard Dataverse / Carl KlarnerUpdated Sep 30, 2026, 7:29 AM ET