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.

The Epping Ongar Railway is a heritage railway in south-west Essex, England, run by a small number of paid staff and a team of volunteers. It was the final section of the Great Eastern Railway branch line, later the London Underground's Central line from Loughton via Epping to Ongar, with intermediate stations at North Weald and Blake Hall. The line was closed by London Underground in 1994 and sold in 1998. It reopened between 2004 and 2007 as a preserved railway, offering a volunteer-run Class 117 DMU service between Ongar and Coopersale. A change of ownership in 2007 led to the line being closed for restoration to a heritage steam railway, which opened on 25 May 2012.