2010Flipped from DemocraticFinal resultsIncumbent defeated
2010 election for Massachusetts House District 117
Massachusetts House of Representatives · Massachusetts
Geoff Diehl (R) won with 51.2% of the vote, defeating Allen J. McCarthy (D) by 2.5 points, a seat Democrats won last time.
Geoff DiehlRepublican · winner
51.2%8,553
Allen J. McCarthyDemocrat · incumbent
48.7%8,132
16,691 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 2010
Races before and after
Source: Harvard Dataverse / Carl KlarnerUpdated Sep 30, 2026, 7:29 AM ET