David A. Harlock (born March 16, 1971 in Toronto, Ontario) is a retired Canadian professional ice hockey defenceman.
Selected by the New Jersey Devils in the 1990 NHL Entry Draft, Harlock played for the Toronto Maple Leafs, Washington Capitals, New York Islanders, and Atlanta Thrashers. He played a total of 212 regular season games, scoring 2 goals and 14 assists for 16 points, collecting 188 penalty minutes. Before being drafted he played for the University of Michigan.