Marcus Ashcroft (born 25 September 1971 in Melbourne) is a former Australian rules footballer, who holds the records for the most games for the Brisbane Bears/Brisbane Lions.

Ashcroft was born in Melbourne and moved to the Gold Coast with his family at age 3 spent his junior career at Southport Australian Rules Football Club, and joined the Brisbane Bears in 1989 when the club was in its darkest period.

He made his debut in Round 9 of that year against North Melbourne at the MCG.

Ashcroft played over 150 consecutive games amongst his 318 career appearances (including 145 goals).

A three time premiership player with the Brisbane Lions, Ashcroft retired at the end of 2003, fittingly, in a winning Grand Final.