Ongar railway station is a station on the Epping Ongar Railway heritage line, and a former London Underground station in the town of Chipping Ongar, Essex. It was opened in 1865 by the Great Eastern Railway, and became part of London Transport in 1949. Until its closure as such in 1994, it was the easternmost point of the Central line and the eastern buffers remain the point from which all distances on the London Underground are measured.