Marco "Mark" Giordano (born October 3, 1983 in Toronto, Ontario) and went to Chaminade College School is a Canadian professional ice hockey defenceman who currently plays for the Calgary Flames of the National Hockey League.

Giordano was not drafted in the NHL, but was signed as a free agent by the Flames in 2004. Giordano earned his first call-up to the NHL in 2005–06, playing seven games. He scored his first two NHL goals in his hometown of Toronto on October 14, 2006. On August 28, 2007, Giordano rejected a two-way contract with the Flames to sign on with Moscow Dynamo in Russia. Giordano recently agreed a three year one-way deal with the Flames.

Giordano played for Team Canada in the 2007 Spengler Cup.