Martin Lindsay Millar (born c.1960) is a former sports shooter from Northern Ireland, who competed at six Commonwealth Games from 1986 to 2006, winning two gold medals.
Millar represented Northern Ireland at the 1986 Commonwealth Games in the Full bore rifle Queens prize pair events, winning a bronze medal with David Calvert.
Four years later he represented the Northern Ireland team again in the full bore rifle Queens prize pair events and won another bronze medal for the team (with Calvert) at the 1994 Commonwealth Games in Canada.
He finally won gold at the 1998 Commonwealth Games and followed this up with a second gold four years later in Manchester.
Millar was a member of the Comber Rifle Club and with David Calvert, opened their new club house in 2003.