Marc Ryan (born 14 October 1982) is a New Zealand racing cyclist.

At the 2008 Summer Olympics in Beijing, Ryan won the bronze medal as part of the New Zealand team in team pursuit, together with Sam Bewley, Hayden Roulston, and Jesse Sergent.

At the 2009–2010 UCI Track Cycling World Cup Classics in Melbourne, Ryan and Thomas Scully won the Men's Madison in a time of 44 minutes, 33 seconds, at an average speed of 53.9 km per hour. Second place went to the German riders, Robert Bengsch and Marcel Kalz, and third place to Ukraine.

At the 2012 London Olympics Ryan again won a bronze medal in the team pursuit, together with Jesse Sergent, Sam Bewley, Westley Gough and Aaron Gate.