Lars Michaelsen (born 13 March 1969 in Copenhagen) is a Danish former professional road bicycle racer who last rode for Team CSC. He got his break through in his second year as a professional, when he won the 1995 edition of Gent–Wevelgem. In the 1997 Vuelta a España he won stage 1 and wore the leader's jersey for three days (stage 2, 3 and 5). In 2002 he equalled the best ever Danish result in Paris–Roubaix when he finished fifth, a result he would duplicate in 2005. In the 2006 Paris–Roubaix he was once again in the group of favourites, but he helped team mate Fabian Cancellara win the race and finished 19th himself. In his last race, the 2007 Paris–Roubaix, he finished 11th after a strong race, where only a mechanical failure prevented him from following the favorites. Again a team mate, Stuart O'Grady, won the race.