2006Final results
2006 election for Pennsylvania House District 166
Pennsylvania House of Representatives · Pennsylvania
Greg Vitali (D) won with 66.8% of the vote, defeating John P. Williamson (R) by 33.7 points.
Greg VitaliDemocrat · winner · incumbent
66.8%18,626
John P. WilliamsonRepublican
33.2%9,238
27,864 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 2006
Races before and after
Source: Harvard Dataverse / Carl KlarnerUpdated Sep 30, 2026, 7:29 AM ET