2012Final results
2012 election for Wisconsin Senate District 10
Wisconsin State Senate · Wisconsin
Sheila E. Harsdorf (R) won with 59.2% of the vote, defeating Daniel C. Olson (D) by 18.4 points.
Sheila E. HarsdorfRepublican · winner · incumbent
59.2%51,911
Daniel C. OlsonDemocrat
40.7%35,728
87,734 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