Edgar "Gar" Moon (3 December 1904 – 26 May 1976) was a tennis player from Australia who was best known for winning the 1930 Australian Championships – Men's singles title.

Moon was largely self-taught and practised his skills playing against family in Cabooltura where his father had a dairy farm.

[3] Moon won his first national title at the 1929 Open when he teamed up with Daphne Akhurst to win the mixed doubles championship.

In 1930, Moon won the Australian Open men's singles championship defeating Harry Hopman in the final 6–3, 6–1, 6–3.

In 1932 the native of Queensland completed the triple, capturing the men's doubles title with partner Jack Crawford.