Philadelphia County, Pennsylvania
Philadelphia County is a county in Pennsylvania. Its county FIPS code is 42101. Use the boundary map and neighboring areas below to check the jurisdiction you need.
- Official code
- 42101
- Representative coordinates
- 40.009376, -75.133346
- County type
- County
- County seat or government
- Philadelphia
- Resident population, July 2025
- 1,574,281
- Land area
- 347.901 km²
- Water area
- 20.97 km²
- State
- Pennsylvania
The representative point identifies this area. It is not a street address or a boundary survey.
Time zones in Philadelphia County
| Time zone | Local time and UTC offset | Next clock change |
|---|---|---|
| America/New_York | UTC-05:00 in January; UTC-04:00 in July. Enable JavaScript for the live clock. | Enable JavaScript for upcoming changes. |
Listed zones overlap the mapped area. A point lookup can distinguish sides of a boundary. Your device’s zone may differ.
Census ZIP areas
19004 · 19102 · 19103 · 19104 · 19106 · 19107 · 19108 · 19109 · 19111 · 19112 · 19114 · 19115 · 19116 · 19118 · 19119 · 19120 · 19121 · 19122 · 19123 · 19124 · 19125 · 19126 · 19127 · 19128 · 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 · 19154 · 19428 · 19444
These statistical areas overlap the boundary. They are not delivery assignments; confirm mailing details with USPS ZIP Code Lookup.
Official county information
Use the US government local-office directory ↗ to find the office responsible for your address. A county website has not been confidently matched here. A geographic lookup cannot determine eligibility, tax liability or a court obligation.
Cities, towns and communities
These areas overlap the mapped boundary; an overlap does not mean that every address belongs to both.
Areas sharing the mapped boundary
These areas touch this mapped boundary.
Before using this answer on a form
Use a precise point for address-level questions. A device accuracy circle can cross a boundary; confirm tax, voting or jury details with the responsible office.
Find the county at your current point, check its ZIP area, or find its physical time zone.