It is 11 miles 65 chains (19.0 km) down the line from London Liverpool Street and is situated between Brimsdown and Waltham Cross.

Enfield Lock was the main station for the Royal Small Arms Factory until its closure in the late 1980s, and now serves the large housing development on the site known as Enfield Island Village, as well as the nearby Innova Science and Business park.

The station itself was opened by the Eastern Counties Railway in 1855 as Ordnance Factory, later renamed in 1886[3] to Enfield Lock.

[5] Prior to the completion of electrification in 1969, passenger services between Cheshunt and London Liverpool Street through Enfield Lock station were normally operated by Class 125 diesel multiple units (which had been purpose-built for the line in 1958).

All services at Enfield Lock are operated by Greater Anglia using Class 720 EMUs.