1976Final results
1976 election for Pennsylvania House District 100
Pennsylvania House of Representatives · Pennsylvania
Gibson E. Armstrong (R) won with 68.3% of the vote, defeating Mary Jane Mason (D) by 36.5 points.
Gibson E. ArmstrongRepublican · winner
68.3%14,618
Mary Jane MasonDemocrat
31.7%6,800
21,418 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 1976
Races before and after
Source: Harvard Dataverse / Carl KlarnerUpdated Sep 30, 2026, 7:29 AM ET