Jason Oost (born 10 October 1982) is a Dutch former professional footballer who played as a striker.
He signed his first professional contract with RKC Waalwijk in 2002 after rejecting a move on loan to Excelsior Rotterdam.
He rejected a new contract at Sparta citing the lack of first team football as he was constantly used as a substitute.
In July 2016, it was announced that Oost would retire from professional footballer, ending a 14-year career at the age of 33.
He was called up to represent the Indonesia national football team in 2009, but declined the offer because he did not want to give up his Dutch passport.