Brandywine Creek (BRAN-dee-wein), c.20 mi/32 km long, in SE Pa. and N Del.; rises in small E and W branches in Chester co., Pa., which join 10 mi/16 km SE of Coatesville; flows SE, past Chadds Ford, enters N Del., through Brandywine State Park, to Christina R. 1 mi/1.6 km WNW of its mouth on the Del. R. at Wilmington; 39°55'N 75°38'W.