The Workers' Institute of Marxism-Leninism-Mao Zedong Thought (known as the Workers' Institute of Marxism-Leninism-Mao Tsetung Thought until 1979) was a small Maoist political party based in Brixton, London. It was formed by an ex-member of the Revolutionary Communist Party of Britain (Marxist-Leninist) in 1974 and circulated regular political statements in its publication, the South London Workers' Bulletin, aiming to build a "red base" in Brixton, and to encourage the People's Liberation Army to liberate the area. It claimed to be affiliated to the Communist Party of China.
The party came to broader attention when the diarist in The Times began reprinting some of the group's material, as amusing asides. This exposure may have led to the party being an influence on the fictional Tooting Popular Front in the television programme Citizen Smith.
The group did not achieve continued success, and moved underground following a police raid of their headquarters in around 1980. In 1982 Steve Rayner wrote a study of the organisation, and critiqued its presentism. Although it is unclear whether the group was ever formally dissolved, there is no evidence of activity in recent years.