Matthew Charles Sing (born 13 March 1975) is an Australian former professional rugby league footballer who played in the 1990s and 2000s.

Sing was the sixth player in Australian first grade history to score 150 tries and, as of 2019, is seventh on the all-time try scorers list.

In 1994, he locked down a starting centre spot for Penrith, playing 17 games, scoring six tries and being named the club's Rookie of the Year.

[9] In 1995, Sing made his State of Origin debut for Queensland, starting on the wing in all three games in their 3–0 series victory over New South Wales.

Sing left the Panthers at the end of the 1995 season as the club sided with the rebel Super League competition.

Sing stayed loyal to the Australian Rugby League, signing with the ARL-aligned Sydney City Roosters.

He played in all three games for Queensland in their 1996 State of Origin series loss to New South Wales and in October, represented Australia in their 52–6 win over Papua New Guinea.

In 1999, he earned a recall to the Australian side, coming off the bench in their Anzac Test win over New Zealand.

In the third game of the 2003 State of Origin series, he scored a hat-trick in a 36–6 win over New South Wales and was named man of the match.

[13] In 2005, Sing reversed his retirement decision, starting all three games for Queensland in the 2005 State of Origin series and playing for Australia in the 2005 Anzac Test.