1970Final results
1970 election for South Dakota Legislative District 3
South Dakota State Senate · South Dakota
Louis L. Johnson (R) won with 55.0% of the vote, defeating Russell Peterson (D) by 10.1 points.
Louis L. JohnsonRepublican · winner · incumbent
55.0%3,180
Russell PetersonDemocrat
45.0%2,597
5,777 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 1970
Races before and after
Source: Harvard Dataverse / Carl KlarnerUpdated Sep 30, 2026, 7:29 AM ET