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. Reading city
5. Erie
6. Upper Darby
7. Scranton
8. Lower Merion
9. Bensalem
10. Abington

Largest 10 Zip Codes by Population

1. 19120
2. 19124
3. 19111
4. 17603
5. 19143
6. 19134
7. 19149
8. 19446
9. 15601
10. 19320