2000Final resultsIncumbent defeated
2000 election for South Dakota Legislative District 13
South Dakota House of Representatives · South Dakota
2 seats: Phyllis M. Heineman (R), Don Hennies (R) won.
2 seatsPhyllis M. HeinemanRepublican · winner
39.1%5,506
Don HenniesRepublican · winner
31.4%4,422
Mary PattersonDemocrat · incumbent
29.4%4,138
14,066 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 2000
Races before and after
Source: Harvard Dataverse / Carl KlarnerUpdated Sep 30, 2026, 7:29 AM ET