2010Flipped from DemocraticFinal results
2010 election for South Dakota's at-large District
U.S. House · South Dakota
Kristi L. Noem (R) won with 48.1% of the vote, defeating Stephanie Herseth Sandlin (D) by 2.2 points, a seat Democrats won last time.
Kristi L. NoemRepublican · winner
48.1%153,703
Stephanie Herseth SandlinDemocrat
45.9%146,589
B. Thomas MarkingIndependent
6.0%19,134
319,426 votes
Source: MIT Election Data and Science LabUpdated Sep 30, 2026, 7:25 AM ET
The seat over time
D − R margin in this seat's races around 2010
Races before and after
Source: MIT Election Data and Science LabUpdated Sep 30, 2026, 7:25 AM ET
Money in this race
Each line compares the two campaigns on one scale.
Stephanie Herseth SandlinKristi L. Noem
$2.1M
Raised by the campaign
$2.3M
$2.2M
Spent by the campaign
$2.3M
$2.6K
Cash on hand
$10.7K
Other candidates' campaigns: B. Thomas Marking $7.2K.
Campaign money: FEC, through Dec 31, 2010.
Source: FEC campaign filingsUpdated Dec 31, 2010