County Line Station is an interurban rapid transit station on the SEPTA Norristown High Speed Line (Route 100). The station is located on County Line Road near Matsonford Road in Lower Merion Township, Pennsylvania. Local, Hughes Park Express, and Norristown Express trains all stop at County Line. Trains running south of this station cross under a bridge that carries the Paoli/Thorndale Line line as well as Amtrak's Pennsylvanian and Keystone Service lines.