1968Final results
1968 election for South Dakota Legislative District 15
South Dakota State Senate · South Dakota
Alvin J. Rhian (R) won with 52.5% of the vote, defeating John Herfkens (D) by 5.0 points.
Alvin J. RhianRepublican · winner · incumbent
52.5%3,677
John HerfkensDemocrat
47.5%3,330
7,007 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 1968
Races before and after
Source: Harvard Dataverse / Carl KlarnerUpdated Sep 30, 2026, 7:29 AM ET