Leo Nosworthy (21 November 1927 – 13 April 2021) was an Australian rugby league footballer who played in the 1940s and 1950s.
In 1969, he became the premiership winning coach of the Balmain Tigers rugby league team.
Although his Sydney career was brief, Nosworthy was a very successful captain-coach in rural New South Wales at Dubbo and Narromine.
As a player, he represented Western Division against touring French teams in 1951 and 1955.
In 1969, Nosworthy was appointed first grade coach of Balmain, replacing the recently retired Tigers' legend Keith Barnes.