Fun With Maps: Voter Registration by County (Sept. 2024)
Democrats dominate the big cities and southeast collar counties, ceding to the GOP the other 54 counties in the state.
Largest Democratic Counties (total from August 12, 2024)
Philadelphia, 785,587 (778,087)
Allegheny, 513,089 (510,922)
Montgomery, 307,342 (305,757)
Delaware, 206,026 (204,605)
Bucks, 199,151 (198,438)
Chester, 161,642 (160,118)
Lancaster, 113,004 (112,182)
Lehigh, 112,859 (112,164)
Berks, 107,619 (107,571)
York, 98,123 (97,419)
Registered Democrat Change (3,925,766 from 3,902,055, +0.6%)
Largest Republican Counties
Allegheny, 264,165 (261,870)
Montgomery, 208,848 (207,543)
Bucks, 201,001 (198,972)
Lancaster, 181,356 (179,722)
York, 166,778 (165,026)
Chester, 154,204 (152,883)
Delaware, 147,647 (146,919)
Westmoreland, 127,336 (126,214)
Philadelphia, 126,266 (123,513)
Berks, 113,880 (113,204)
https://www.politicspa.com/fun-with-maps-voter-registration-by-county-sept-2024/139260/