2004Final results
2004 election for South Dakota Legislative District 26
South Dakota State Senate · South Dakota
John Koskan (R) won with 57.1% of the vote, defeating David Reis (D) by 14.3 points.
John KoskanRepublican · winner · incumbent
57.1%5,803
David ReisDemocrat
42.9%4,354
10,157 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 2004
Races before and after
Source: Harvard Dataverse / Carl KlarnerUpdated Sep 30, 2026, 7:29 AM ET