10 Most Populated ZIP Codes in Pennsylvania

The top ZIP code for population in Pennsylvania is 19124 (Philadelphia, Philadelphia County), with a population of 70,763. Across the top 10 most populated ZIP codes in Pennsylvania, population ranges from 70,763 to 56,348, covering communities from Philadelphia to Philadelphia.

Rank	ZIP	City	County	Population	Population
1	19124	Philadelphia	Philadelphia County	70,763	70,763
2	19120	Philadelphia	Philadelphia County	68,078	68,078
3	17603	Lancaster	Lancaster County	66,788	66,788
4	19111	Philadelphia	Philadelphia County	65,821	65,821
5	19143	Philadelphia	Philadelphia County	62,503	62,503
6	19446	Lansdale	Montgomery County	61,608	61,608
7	19149	Philadelphia	Philadelphia County	57,226	57,226
8	19020	Bensalem	Bucks County	57,079	57,079
9	19134	Philadelphia	Philadelphia County	56,750	56,750
10	17601	Lancaster	Lancaster County	56,348	56,348

Methodology

Rankings are derived from the U.S. Census Bureau American Community Survey 5-Year Estimates, vintage 2019 to 2023, joined to USPS ZIP Code Tabulation Areas. We rank by population and surface the top 10 ZIP codes within Pennsylvania. Values reflect ZCTA-level estimates and may differ slightly from city-level figures. Compiled and reviewed by the Zip Code Near Me Data Team.

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Reviewed by Zip Code Near Me Data Team. Last verified June 13, 2026.

10 Most Populated ZIP Codes in Pennsylvania

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