Leon David Piasetski (born 24 December 1951) is a Canadian chess player who holds the titles of International Master (IM) (1975).

For many years Leon David Piasetski was one of the top Canadian chess players.

In 1970, he won the individual Canadian Junior Chess Championship.

Piasetski was also a multiple finalist of the individual Canadian Chess Championship, winning, among others bronze medal in 1975.

In 1990 in Manila Piasetski participated in the World Chess Championship Interzonal Tournament where shared 60th - 63rd place.