Mark James Cosgrove (born 14 June 1984, in Elizabeth, South Australia) is a former Australian ODI cricketer and a first-class cricketer. He is a left-handed batsman and part-time medium pace bowler. In 2005 Cosgrove was named the Bradman Young Player of the Year.
Cosgrove debuted internationally with a One Day International against Bangladesh at Fatullah Osmani Stadium, Fatullah on 28 April 2006, responding with an aggressive half-century.