Percy Dermond (Sydney, Australia) was a rugby league player in Australia's premier competition the New South Wales Rugby Football League (NSWRFL).
A Winger, Dermond played for the Eastern Suburbs club in the years (1938-39), (1941-43) and (1946-47). In the 1941 Season Dermond, with a total of 13 tries for that year, was one, of three players, to be that seasons leading try scorer.
Dermond played in two premierships deciders for Eastern Suburbs club. However, they lost both matches. In 1938 they were defeated by Canterbury Bankstown in their maiden premiership victory and in 1941 they were defeated by St George, it was also their first premiership victory.
The winger played a total of 51 matches for the club, scoring a total of 36 tries and is officially recognised as the clubs 259th player.