This is the 1980 race. The latest: 2026 →

1980Final results

1980 election for South Dakota Legislative District 13

South Dakota State Senate · South Dakota

Eugene R. Mahan (D) won with 67.2% of the vote, defeating Richard W. Stene (R) by 34.4 points.

Eugene R. MahanDemocrat · winner · incumbent
67.2%6,315
32.8%3,084
9,399 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 1980

Races before and after

EvenD+34.41980D+44.71982R+30.81984R+2.81986R+4.01988R+6.71990

Source: Harvard Dataverse / Carl KlarnerUpdated Sep 30, 2026, 7:29 AM ET