Dan O'Halloran (born March 25, 1964 in Essex, Ontario) is an National Hockey League referee, who wears uniform number 13. He was one of the selected referees who officiated the 2007 Stanley Cup Finals with Paul Devorski. He was selected again to officiate the 2008 Stanley Cup Finals along with Devorski. He was also selected as one of 13 NHL referees to officiate at the 2010 Winter Olympics in Vancouver, including the Gold Medal Game.