2010Final results
2010 election for Iowa Senate District 31
Iowa State Senate · Iowa
Matt McCoy (D) won with 65.3% of the vote, defeating Dave Leach (R) by 30.9 points.
Matt McCoyDemocrat · winner · incumbent
65.3%13,385
Dave LeachRepublican
34.5%7,064
20,483 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 2010
Races before and after
Source: Harvard Dataverse / Carl KlarnerUpdated Sep 30, 2026, 7:29 AM ET