Pennsylvania Demographics Site Map

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Browse Pennsylvania Zip Codes

• Zip Codes by Population

Largest 10 Counties by Population

1. Philadelphia County
2. Allegheny County
3. Montgomery County
4. Bucks County
5. Delaware County
6. Lancaster County
7. Chester County
8. York County
9. Berks County
10. Lehigh County

Largest 10 Cities by Population

1. Philadelphia
2. Pittsburgh
3. Allentown
4. Erie
5. Reading
6. Upper Darby
7. Scranton
8. Bensalem
9. Lancaster city
10. Lower Merion

Largest 10 Zip Codes by Population

1. 19120
2. 19124
3. 19111
4. 19143
5. 17603
6. 19134
7. 19149
8. 15601
9. 19446
10. 19020