David Clark (born Toowoomba, 18 February 1940) is a former Australian rugby union footballer and a current coach.
He moved there in 1996 to lead the Commonwealth Centre for Sports Development (PacificSport) rugby programme in Victoria, British Columbia.
Clark was nominated the first professional head coach of Canada, after the 1999 Rugby World Cup finals.
He was controversially sacked on 1 August 2001, but his players launched a strike that eventually reinstated him as head coach of Canada, in November 2001.
Canada had previously beaten Tonga, Scotland, Italy, and drew with Ireland during his reign, and moved from 14th in the World rankings to 11th when he departed in 2004.