2000Final results
2000 election for Wisconsin Senate District 20
Wisconsin State Senate · Wisconsin
Mary E. Panzer (R) won with 73.1% of the vote, defeating Dale Koski (D) by 46.2 points.
Mary E. PanzerRepublican · winner · incumbent
73.1%65,280
Dale KoskiDemocrat
26.9%24,033
89,313 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