The CDP is in westernmost Delaware County and southeastern Chester County, in the northwestern part of Chadds Ford Township, the eastern part of Pennsbury Township, and the southern corner of Birmingham Township. Brandywine Creek runs through the center of the CDP, forming first the boundary between Pennsbury and Birmingham township and then the boundary between Chester and Delaware counties. The village of Chadds Ford is in the northwest part of Chadds Ford Township, at the junction of U.S. Route 1 and Pennsylvania Route 100, while Chadds Ford Knoll and other suburban developments are in the Chester County parts of the CDP.
U.S. Route 1 leads east-northeast 12 miles (19 km) to Media and west-southwest 7 miles (11 km) to Kennett Square, while Route 100 leads north 8 miles (13 km) to West Chester and south 10 miles (16 km) to Wilmington, Delaware.