Michael Rasmussen (born 1 June 1974) is a retired Danish professional cyclist who competed in road racing and mountain biking. His most notable victories include four stages of the Tour de France (shared Danish record), one stage of the Vuelta a España and a win on the Italian classic Giro dell'Emilia in 2002. He also won the best climber classification in the 2005 and 2006 Tour de France.

Specializing in climbing, Rasmussen showed a propensity for attempting spectacular wins in mountain stages in which he broke away from the peloton early and rode alone for most of the stage. Michael Rasmussen was known for his care for detail when considering weight. With a low weight (60 kg) he was usually one of the lightest riders in his class.

In the 2007 Tour de France, Rasmussen while wearing the yellow jersey and well on his way to winning the Tour, had his contract terminated by his team and was removed from the Tour. He served a two-year ban from July 2007 to July 2009 for lying about his whereabouts. At a press conference on 31 January 2013, Rasmussen admitted that he had used performance-enhancing drugs and methods, including EPO, growth hormones, insulin, testosterone, DHEA, IGF-1, Oxyglobin, cortisone and blood doping, for most of his professional career.