Troy John Longmuir (born 27 May 1979) is an Australian rules footballer formerly in the Australian Football League (AFL). He is the older brother of former Fremantle player Justin Longmuir. He was recruited as the number-22 draft pick in the 1997 AFL draft from West Perth. He made his AFL debut for the Melbourne Football Club in Round 9, 1998, against Essendon. He was delisted by Carlton at the end of 2006 after 11 games. He returned to West Perth in 2007 as a WAFL-listed player. Longmuir retired at the end of 2009 after playing 100 games for the Falcons between 1997 and 2009.