Delaware County, Pennsylvania (Delco)

History

Delaware County was created in the late 18th century and formally established on September 26, 1789. Its name derives from the adjacent river, which itself was named for the English nobleman Lord De La Warr. The county grew through colonial settlement, early industry along riverfronts, and later suburbanization as the Philadelphia metropolitan area expanded. Historic towns and preserved districts reflect colonial, 19th-century industrial, and 20th-century suburban development patterns.

Geography and communities

The county occupies a compact area of suburban neighborhoods, small cities, and remaining green spaces. It includes parts of the Philadelphia Main Line’s western suburbs, riverfront communities, and older industrial municipalities. Major population centers and municipalities include townships and boroughs such as Upper Darby, Chester, and Haverford. For local resources and maps consult county and state information pages: county resources and state resources.

Economy, transport and institutions

Delaware County's economy blends manufacturing legacy, healthcare, education, retail, and services. It benefits from proximity to Philadelphia with commuter rail, regional highways and freight connections that support business and commuting. Higher-education institutions and regional hospitals serve as important employers. Visitors and residents use a mix of transit options and arterial roads; planning and transit details can be found via regional agencies and local government portals such as regional links.

Culture, government and notable facts

Local government is organized around county-level administration, municipal governments, and elected officials who manage courts, public health, and services. Cultural life in Delco includes historic sites, parks, arts events in small downtowns, and community festivals. The county has a diverse population and a long association with the broader Philadelphia economy. For municipal listings and civic information see resources like local listings and planning sites such as Media borough pages and regional reference pages at river and environmental resources.

Quick facts and places of interest

• County seat: Media.
• Common nickname: "Delco".
• Bordering city: Philadelphia.
• Major waterways and environmental features: Delaware River and associated corridors.
• See countywide portals and visitor guides at official county and state resources.