1978Final results
1978 election for South Dakota Legislative District 25
South Dakota State Senate · South Dakota
Marshall J. Truax (D) won with 53.0% of the vote, defeating Maynard Downen (R) by 6.0 points.
Marshall J. TruaxDemocrat · winner
53.0%3,316
Maynard DownenRepublican
47.0%2,939
6,255 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 1978
Races before and after
Source: Harvard Dataverse / Carl KlarnerUpdated Sep 30, 2026, 7:29 AM ET