Luke Darcy (born 12 June 1975) is a former professional Australian rules footballer who played for the Footscray/Western Bulldogs in the AFL.
The son of former Footscray defender David Darcy, Luke played junior football for South Adelaide before being selected by the Bulldogs under the father-son rule. After playing four games in his first three years, Darcy became a regular member of the side in 1996, partnering Brownlow Medalist Scott Wynd in the ruck. He made his 100th appearance early in the 2000 season, and following Wynd's retirement, was the Bulldogs' best and fairest in 2001. The following year, Darcy was named in the All-Australian side. He played his 200th game early in 2005, but suffered a knee injury several weeks later that ruled him out of the rest of the year. Darcy then suffered a ruptured ACL during the following pre-season, and as a result missed the entire 2006 season. He returned to play every game in the 2007 season before retiring at the end of the year, finishing with 226 games for the Bulldogs.
In retirement Darcy went into the media, becoming a commentator for Channel Seven as well as appearing on breakfast radio in Melbourne.