The Fox Chase Branch, formerly the Newtown Branch, is a railway line in the state of Pennsylvania. It runs 4.9 miles (7.9 km) from a junction with the SEPTA Main Line near Wayne Junction to Fox Chase. At its fullest extent, it continued another fifteen miles north to Newtown. The oldest part of it was built in 1876 by the Philadelphia, Newtown and New York Railroad. It was part of the Reading Company system from 1879 until 1976. Today it is owned by SEPTA and hosts the Fox Chase Line commuter rail service.