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Delaware County, Pennsylvania
Delaware County packs 184 square miles between Philadelphia, the Delaware River and the state line, running from the Main Line townships through Upper Darby to the riverfront at Chester and Marcus Hook. With almost no greenfield land left, growth comes from redevelopment, the Chester waterfront around Subaru Park, downtown Upper Darby, refinery-era parcels at Marcus Hook, so brownfield history and township zoning drive most deals.
Open the live Delaware County map →
Delaware County at a glance
- 581,000Population (2025)
- MediaCounty seat
- 184 sq miLand area
- 3,158 / sq miDensity
- $90,000Median household income
- $330,000Median home value
What the live Delaware County map shows
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- City Boundaries: 49
- School Boundaries: 17
- Zoning: 517
- Bus Stops: 1,560
- Congressional Districts: 1
- Emergency Services: 123
- Flood Zones: 3
- HUD: 112
- House Districts: 12
- Opportunity Zones: 6
- Parks & Golf: 342
- Schools: 199
- Senate Districts: 5
- Soils: 137
- Voter Precincts: 427
- Wetlands: 6
- Zip Codes: 51
- Development News: 4
Cities and towns in Delaware County
Aldan Borough, Aston Township, Bethel Township, Brookhaven Borough, Chadds Ford Township, Chester, Chester Heights Borough, Chester Township, Clifton Heights Borough, Collingdale Borough, Colwyn Borough, Concord Township, Darby Borough, Darby Township, East Lansdowne Borough, Eddystone Borough, Edgmont Township, Folcroft Borough, Glenolden Borough, Haverford Township, Lansdowne Borough, Lower Chichester Township, Marcus Hook Borough, Marple Township, Media Borough, Middletown Township, Millbourne Borough, Morton Borough, Nether Providence Township, Newtown Township, Norwood Borough, Parkside Borough, Prospect Park Borough, Radnor Township, Ridley Park Borough, Ridley Township, Rose Valley Borough, Rutledge Borough, Sharon Hill Borough, Springfield Township, Swarthmore Borough, Thornbury Township, Tinicum Township, Trainer Borough, Upland Borough, Upper Chichester Township, Upper Darby Township, Upper Providence Township, Yeadon Borough.