2004Final results
2004 election for Pennsylvania House District 166
Pennsylvania House of Representatives · Pennsylvania
Greg Vitali (D) won with 59.9% of the vote, defeating John P. Williamson (R) by 19.8 points.
Greg VitaliDemocrat · winner · incumbent
59.9%20,979
John P. WilliamsonRepublican
40.1%14,041
35,020 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 2004
Races before and after
Source: Harvard Dataverse / Carl KlarnerUpdated Sep 30, 2026, 7:29 AM ET