2012Final results
2012 election for South Dakota Legislative District 11
South Dakota State Senate · South Dakota
David M. Omdahl (R) won with 56.7% of the vote, defeating Tom Cool (D) by 13.5 points.
David M. OmdahlRepublican · winner
56.7%5,888
Tom CoolDemocrat
43.3%4,488
10,376 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