2014Final results
2014 election for Michigan Senate District 21
Michigan State Senate · Michigan
John Proos (R) won with 64.5% of the vote, defeating Bette Pierman (D) by 29.0 points.
John ProosRepublican · winner · incumbent
64.5%45,586
Bette PiermanDemocrat
35.5%25,090
70,676 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 2014
Races before and after
Source: Harvard Dataverse / Carl KlarnerUpdated Sep 30, 2026, 7:29 AM ET