Nunhead Cemetery is one of the Magnificent Seven cemeteries in London, England. It is perhaps the least famous and celebrated of them. The cemetery is located in Nunhead in the London Borough of Southwark and was originally known as All Saints' Cemetery. Nunhead Cemetery was consecrated in 1840 and opened by the London Cemetery Company. It is a Local Nature Reserve.

The Magnificent Seven is an informal term applied to seven large private cemeteries in London. These are Kensal Green Cemetery, West Norwood Cemetery, Highgate Cemetery, Abney Park Cemetery, Brompton Cemetery, Nunhead Cemetery, and Tower Hamlets Cemetery. They were established in the 19th century to alleviate overcrowding in existing parish burial grounds as London’s population grew during the Victorian era. In 1981, the architectural historian Hugh Meller dubbed the group of cemeteries "The Magnificent Seven" after the 1960 western film of the same name.