With summer brisk approaching Labor Day, we decided to take a look at the commonwealth’s voter registration numbers and their potential impact on the November general election.
Democrats (3.9 million) still have a registration advantage over Republicans (3.55 million) by about 356,000 voters. The number of unaffiliated voters is just over one million (1.03 million), while the number of non-affiliated voters is just under 345,000.
Democrats dominate vast cities and southeastern counties, handing the Republican Party the remaining 54 counties in the state.
Largest Democratic Counties
- Philadelphia, 778 087
- Allegheny, 510 922
- Montgomery, 305 757
- Delaware, 204 605
- Dollars, 198,438
- Chester, 160 118
- Lancaster, 112 182
- Lehigh, 112 164
- Berks, 107 571
- York, 97 419
Largest Republican Counties
- Allegheny, 261 870
- Montgomery, 207 543
- Dollars, 198,972
- Lancaster, 179 722
- York, 165 026
- Chester, 152 883
- Delaware, 146 919
- Westmoreland, 126 214
- Philadelphia, 123513
- Berks, 113 204
The largest counties “without affiliation”
- Philadelphia, 127 546
- Allegheny, 102,336
- Montgomery, 71,678
- Dollars, 61,680
- Chester, 51 858
- York, 46 402
- Lancaster, 43,594
- Delaware, 42,525
- Lehigh, 40,958
- Berks, 34,636
Democrats continue to see shifts to Republicans, independents, or other parties since the start of 2024, as 39,278 people signed on as GOP members while 22,786 indicated another preference. By comparison, the GOP lost 14,652 to Democratic registrations and an additional 21,991 to others.
All parties are fiercely courting “young” voters, with Democrats holding an advantage among 18- to 24-year-olds, with 306,109 registered voters compared to 242,579 for the Republican Party — a difference of almost 64,000.
Democrats also have a significant lead among registered voters aged 25-44, with more than 1.34 million identifying as “D” and just under 950,000 identifying as Republicans.
The Republican Party has a significant advantage among people aged 55-64: Democrats support them by a margin of 713,000 to 605,000.
