2000Final results
2000 election for Iowa Senate District 16
Iowa State Senate · Iowa
Mark Zieman (R) won with 56.2% of the vote, defeating Roger Thomas (D) by 12.3 points.
Mark ZiemanRepublican · winner
56.2%13,847
Roger ThomasDemocrat
43.8%10,807
24,654 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