1974Final results
1974 election for Wisconsin Senate District 31
Wisconsin State Senate · Wisconsin
Thomas W. Harnisch (D) won with 56.1% of the vote, defeating Harold J. Lachapelle (R) by 12.2 points.
Thomas W. HarnischDemocrat · winner
56.1%21,675
Harold J. LachapelleRepublican
43.9%16,955
38,641 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 1974
Races before and after
Source: Past results: 99chambers results archive (MEDSL, Klarner, state election offices)