Matthew Stajan (/steɪˈdʒæn/ stay-JAN; born December 19, 1983) is a Canadian former professional ice hockey centre. He was a second round selection, 57th overall, of the Toronto Maple Leafs at the 2002 NHL entry draft. Stajan made his NHL debut in 2004 and was a member of the Maple Leafs until he was traded to the Calgary Flames in 2010. Stajan played his final professional season with EHC Red Bull München of the Deutsche Eishockey Liga (DEL)

Internationally, Stajan was a member of the Canadian national junior team that won a silver medal at the 2003 World Junior Hockey Championships.

A native of Mississauga, Ontario, Stajan played his minor hockey in the Greater Toronto Hockey League with the Toronto Red Wings and Mississauga Senators associations before being drafted by the Belleville Bulls in the Ontario Hockey League (OHL) Priority Selection draft in 2000. He played three seasons in the OHL between 2000 and 2003 in which he scored 206 points in 182 games. Stajan made his debut in 2000–01 season with a 27-point season in 57 games, then improved to 33 goals and 85 points the following season. He also finished with a plus-minus rating of +36 and was a finalist in an OHL coaches poll naming the best defensive forward. Stajan was also a member of the OHL's Eastern Conference All-Star Team in the Canadian Hockey League's All-Star series.

The Toronto Maple Leafs selected Stajan with their second-round pick, 57th overall, at the 2002 NHL entry draft. He described being chosen by his hometown team as a "dream come true". He returned to Belleville for his final OHL season in 2002–03 where he finished 8th in league scoring with 94 points. He played his second all-star game for the Eastern Conference, and was named to the OHL's third All-Star Team following the season. Stajan was also a member of the Canadian national junior team at the 2003 World Junior Hockey Championships. He scored a goal and an assist in six games to help Canada win the silver medal.

Stajan was assigned to the American Hockey League (AHL)'s St. John's Maple Leafs at the conclusion of Belleville's season. He made his professional debut on April 4, 2003, and registered an assist against the Manitoba Moose. He was recalled to Toronto and made his NHL debut the following night against the Ottawa Senators. He scored his first goal that night on goaltender Martin Prusek in a 3–1 loss. Stajan earned a spot on the Toronto roster in 2003–04; he appeared in 69 games in his rookie season, scored 14 goals and recorded 27 points. He appeared in three playoff games. Stajan also participated in the YoungStars Game at the 2004 All-Star Game, where he scored a goal and an assist for the Eastern Conference in a 7–3 loss to the West.

While the 2004-05 season was delayed, and ultimately cancelled, due to a labour dispute, Stajan was assigned to St. John's. He recorded 66 points in 80 games and scored 23 goals. Stajan returned to Toronto when NHL play resumed in 2005–06 where he focused on developing his two-way play, trying to become both an offensive presence while remaining defensively responsible. He finished with 27 points, and led the league with eight short-handed points (tied with Marián Hossa).

The Maple Leafs and Stajan agreed to a new two-year, $1.75 million contract prior to the 2006–07 season. His offensive production improved modestly; he scored 39 points that season and followed it with 33 in 2007–08. His performances earned him another two-year contract, worth $3.5 million.

With 55 points in 76 games, Stajan finished third in Maple Leafs' scoring in 2008–09; his 40 assists led the team. He was again among Toronto's leading scorers, with 41 points in 55 games, when he was included in a blockbuster trade: On January 31, 2010, Stajan was sent to the Calgary Flames, along with Niklas Hagman, Ian White and Jamal Mayers in exchange for Dion Phaneuf, Fredrik Sjöström and Keith Aulie. He finished the year with 16 points in 27 games with Calgary, resulting in a combined total and career high of 57 points.