Mark Giordano (; born October 3, 1983) is a Canadian professional ice hockey defenceman and captain for the Calgary Flames of the National Hockey League (NHL). An undrafted player, Giordano signed with the Flames as a free agent in 2004 after playing two seasons of major junior hockey with Owen Sound Attack of the Ontario Hockey League (OHL). Since making his debut in 2006, Giordano has played his entire NHL career with the Flames but left the team for one season, 2007–08, to play for Dynamo Moscow of the Russian Super League.