Jun Woong-sun (born 14 June 1986) is a professional South Korean tennis player.

Jun reached his highest individual ranking on the ATP Tour on May 26, 2008, when he became World number 230.

He plays primarily on the Futures circuit and the Challenger circuit.

Jun has been a member of the South Korean Davis Cup team, posting a 9–5 record in singles and a 3–3 record in doubles in twelve ties played.

This biographical article relating to South Korean tennis is a stub.