St Mark's Church is a Church of England parish church in Forest Gate, east London.
It is sited on Lorne Road and originated as a mission church of Emmanuel Church. It was meant to serve the area between Wanstead Flats and the Romford Road and initially held services in a rented cowshed, until a site was acquired in 1888 for a permanent church, built in three stages between 1893 and 1898. This church was given a separate parish in 1894 by splitting off areas from Emmanuel and All Saints.
St Mark's stands in the evangelical tradition of the Church of England.