1968Final resultsIncumbent defeated
1968 election for South Dakota Legislative District 19
South Dakota House of Representatives · South Dakota
Lewis R. Marquardt (D) won with 51.0% of the vote, defeating Tommy Knutson (R) by 2.1 points.
Lewis R. MarquardtDemocrat · winner
51.0%2,332
Tommy KnutsonRepublican · incumbent
49.0%2,237
4,569 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