Delaware County, Pennsylvania
Delaware County is a county in Pennsylvania. Its county FIPS code is 42045. Use the boundary map and neighboring areas below to check the jurisdiction you need.
- Official code
- 42045
- Representative coordinates
- 39.916685, -75.398818
- County type
- County
- County seat or government
- Media
- Resident population, July 2025
- 580,937
- Land area
- 476.06 km²
- Water area
- 17.592 km²
- State
- Pennsylvania
The representative point identifies this area. It is not a street address or a boundary survey.
Time zones in Delaware 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
19003 · 19008 · 19010 · 19013 · 19014 · 19015 · 19017 · 19018 · 19022 · 19023 · 19026 · 19029 · 19032 · 19033 · 19036 · 19041 · 19043 · 19050 · 19052 · 19060 · 19061 · 19063 · 19064 · 19070 · 19073 · 19074 · 19076 · 19078 · 19079 · 19081 · 19082 · 19083 · 19085 · 19086 · 19087 · 19094 · 19096 · 19113 · 19153 · 19312 · 19317 · 19319 · 19342 · 19373 · 19382
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.
- Aldan borough, PA
- Ardmore CDP, PA
- Boothwyn CDP, PA
- Brookhaven borough, PA
- Broomall CDP, PA
- Bryn Mawr CDP, PA
- Chadds Ford CDP, PA
- Chester city, PA
- Chester Heights borough, PA
- Cheyney University CDP, PA
- Clifton Heights borough, PA
- Collingdale borough, PA
- Colwyn borough, PA
- Darby borough, PA
- Dilworthtown CDP, PA
- Drexel Hill CDP, PA
- East Lansdowne borough, PA
- Eddystone borough, PA
- Folcroft borough, PA
- Folsom CDP, PA
- Glenolden borough, PA
- Haverford College CDP, PA
- Lansdowne borough, PA
- Lima CDP, PA
- Linwood CDP, PA
- Marcus Hook borough, PA
- Media borough, PA
- Millbourne borough, PA
- Morton borough, PA
- Norwood borough, PA
Browse all cities, towns and communities for Delaware County
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.
Small boundary contacts to check
These maps have small contacts that do not confidently establish another jurisdiction or clock zone. They remain separate from the main answer. Check a precise address near the line with the responsible authority.