1984Flipped from DemocraticFinal results
1984 election for Montana House District 1
Montana House of Representatives · Montana
Mary Lou Peterson (R) won with 56.5% of the vote, defeating Floyd Henley (D) by 24.9 points, a seat Democrats won last time.
Mary Lou PetersonRepublican · winner
56.5%1,925
Floyd HenleyDemocrat
31.5%1,075
Michael F. TanchekLibertarian
12.0%410
3,410 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