Mayesbrook Park is a 43 hectare public park in the London Borough of Barking and Dagenham and in the post town of Dagenham and the pre-1965 borough of Barking. It is owned and managed by the borough council. The southern end, which is mainly a large lake, is a Local Nature Reserve. The area covered by the park was once part of the historic Manor of Jenkins, seat of the Fanshawe family. For reasons which remain obscure, the park is nicknamed "Matchstick Island".