Ridley Creek

Ridley Creek
Ridley Creek flowing through Ridley Creek State Park
Location of the Mouth of Ridley Creek in Delaware County, Pennsylvania
Location
CountryUnited States
StatePennsylvania
CountiesChester, Delaware
Physical characteristics
Source 
  locationFrazer, Chester County
  coordinates40°01′03″N 75°32′22″W / 40.01750°N 75.53944°W / 40.01750; -75.53944
  elevation2,180 ft (660 m)
MouthDelaware River
  location
Eddystone Borough, Delaware County
  coordinates
39°50′59″N 75°20′38″W / 39.84972°N 75.34389°W / 39.84972; -75.34389
Length23.4 mi (37.7 km)
Basin size37.9 sq mi (98 km2)

Ridley Creek is a tributary of the Delaware River in Chester and Delaware counties, Pennsylvania in the United States.

The entire drainage basin is in the suburban Philadelphia area, but the upper creek and extensive park lands on the creek retain a rural character, while the mouth of the creek has long been heavily industrialized. Its watershed is considered to have the highest quality water in Delaware County. The creek was named for the parish of Ridley, Cheshire, England.