Leonard Tasman Mason (23 September 1903 – 10 June 1953) was a New Zealand professional rugby league footballer who played in the 1920s and 1930s. He played at representative level for New Zealand, Other Nationalities, Dominion XIII, the South Island, South Auckland and Canterbury, and at club level for Wigan (Heritage № 331), Keighley and Bramley, as a centre, prop, hooker, or second-row.