2010Final results
2010 election for South Dakota Legislative District 31
South Dakota State Senate · South Dakota
Tom Nelson (R) won with 59.5% of the vote, defeating Nyla D. Griffith (D) by 18.9 points.
Tom NelsonRepublican · winner · incumbent
59.5%5,824
Nyla D. GriffithDemocrat
40.5%3,970
9,794 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