Philadelphia County, Pennsylvania
County seat: Philadelphia · Population 1.6 million (2025) · 134 sq mi
Philadelphia County is the most populous of Pennsylvania's 67 counties, with 1,574,281 people (2025 estimate). Its county seat is Philadelphia. It is part of the District 6 region, one of the 11 PennDOT engineering districts. The map shows its 1 city or town and the 6 neighboring counties.
Philadelphia County facts
- County seat
- Philadelphia
- Population (2025 estimate)
- 1,574,281 −1.8% since 2020
- Land area
- 134 sq mi 66th largest of 67
- Water area
- 8 sq mi
- Population density
- 11,720 per sq mi
- Established
- 1682
- Named after
- Philadelphia largest city in the U.S. state of Pennsylvania and seat of Philadelphia County
- Largest city
- Philadelphia 1,574,281
- Median household income
- $61,953
- Cities and towns
- 1
- ZIP codes
- 49
- Time zone
- Eastern
- FIPS code
- 42101
Cities and towns in Philadelphia County
Philadelphia County has 1 incorporated place. Populations count the people living inside Philadelphia County; cities that cross a county line also list the other counties.
| Name | Type | Population 2025 | Also in |
|---|---|---|---|
| Philadelphia (county seat) | City | 1,574,281 |
ZIP codes in Philadelphia County
49 ZIP codes reach into Philadelphia County. ZIP codes ignore county lines, so some also cover a neighboring county.
- 19102
- 19103
- 19104
- 19106
- 19107
- 19108
- 19109
- 19111
- 19112
- 19114
- 19115
- 19116
- 19118 also Montgomery County
- 19119
- 19120
- 19121
- 19122
- 19123
- 19124
- 19125
- 19126
- 19127
- 19128 also Montgomery County
- 19129
- 19130
- 19131
- 19132
- 19133
- 19134
- 19135
- 19136
- 19137
- 19138
- 19139
- 19140
- 19141
- 19142
- 19143
- 19144
- 19145
- 19146
- 19147
- 19148
- 19149
- 19150
- 19151
- 19152
- 19153 also Delaware County
- 19154
Population of Philadelphia County, 2020–2025
Philadelphia County shrank by 29,519 people (−1.8%) between April 2020 and July 2025: 16,979 more births than deaths and a net loss of 48,570 people from migration.
| Year (July 1) | Population |
|---|---|
| 2020 | 1,600,737 |
| 2021 | 1,590,224 |
| 2022 | 1,572,341 |
| 2023 | 1,565,822 |
| 2024 | 1,572,735 |
| 2025 | 1,574,281 |
Neighboring counties
- Montgomery County northwest · 877,643 people
- Delaware County southwest · 580,937 people
- Bucks County north · 647,828 people
- Camden County, New Jersey southeast · 535,799 people
- Burlington County, New Jersey east · 481,439 people
- Gloucester County, New Jersey south · 312,638 people
Printable Philadelphia County map
The PDF is a vector file with real text: it prints sharp on Letter paper and you can search it for a town. The PNG is 2400 pixels wide for slides and documents. Both are free to use with a credit to WhichCounty.
- PDF (Letter) (75 KB)
- PNG (2400 px) (92 KB)
Paste this code to embed the map on your site:
Sources
- Boundaries: U.S. Census Bureau, 2025 Cartographic Boundary Files (1:500,000).
- Population: Census Bureau county and city estimates, Vintage 2025. CDP populations: American Community Survey 2020–2024.
- Places and ZIP codes: Census Bureau 2026 Gazetteer and 2020 ZIP Code Tabulation Area relationship files.
- County seat, founding year and name origin: Wikidata (CC0), checked against state sources.
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