Leslie Jack Twentyman OAM (3 February 1948 – 30 March 2024) was an Australian youth outreach worker and community activist.

He was one of Victoria's best-known social campaigners on issues ranging from homelessness, drug abuse, prison reform, and welfare.

[9] In 1989, he created a portion of the Save the Dogs committee, after a potential merge between the Western Bulldogs and Fitzroy, which did not occur as a result.

[9] He also stood in the 2008 Kororoit by-election for the Victorian Legislative Assembly on 28 June 2008, coming in third behind the Labor and Liberal parties as an Independent candidate.

[20] Afterwards, the Victorian government's offer of a state funeral for Twentyman was accepted by his family, and it was held on April 16th at St Patrick's Cathedral, East Melbourne.