Tredyffrin Township, Pennsylvania

Tredyffrin Township
Location of Tredyffrin Township in Chester County and of Chester County in Pennsylvania
Location of Pennsylvania in the United States
Coordinates: 40°03′48″N 75°22′14″W / 40.06333°N 75.37056°W / 40.06333; -75.37056
CountryUnited States
StatePennsylvania
CountyChester
Founded1707
Area
  Total
19.85 sq mi (51.41 km2)
  Land19.77 sq mi (51.19 km2)
  Water0.09 sq mi (0.22 km2)
Elevation
397 ft (121 m)
Population
 (2010)
  Total
29,332
  Estimate 
(2016)
29,423
  Density1,488.57/sq mi (574.75/km2)
Time zoneUTC-5 (EST)
  Summer (DST)UTC-4 (EDT)
Area code(s)610
FIPS code42-029-77344
Websitewww.tredyffrin.org

Tredyffrin Township ( /trɪˈdɪfrɪn/ Welsh: [trɛˈdɘfrɪn]) is a township located in eastern Chester County, Pennsylvania, United States. The population was 29,332 at the 2010 census.

Settled in the late 17th century, Tredyffrin is bounded by Delaware and Montgomery counties. It includes on its northern boundary a small part of Valley Forge National Historical Park, where George Washington encamped during the American War of Independence. Tredyffrin and the entire Great Valley region also have many limestone deposits. Tredyffrin is the most populous township in Chester County.

Unincorporated communities within Tredyffrin Township include Chesterbrook, Strafford, a portion of Paoli, and a portion of Wayne, Howellville at the intersection of Swedesford and Howellville Roads, and East Howellville, along Howellville Road, west of the intersection of Howellville Road and the border between Tredyffrin and Easttown Townships. Tredyffrin is bordered by Easttown, East Whiteland, Willistown, Charlestown, Upper Merion, Radnor and Schuylkill townships.