1984Final results
1984 election for Michigan House District 18
Michigan House of Representatives · Michigan
Sidney Ouwinga (R) won with 69.2% of the vote, defeating Mack Thomson (D) by 38.4 points.
Sidney OuwingaRepublican · winner · incumbent
69.2%25,356
Mack ThomsonDemocrat
30.8%11,277
36,633 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 1984
Races before and after
Source: Harvard Dataverse / Carl KlarnerUpdated Sep 30, 2026, 7:29 AM ET