Jørgen Marcussen (born 15 May 1950) is a former Danish racing cyclist. He competed, as an amateur, in the individual road race and team time trial events at the 1972 Summer Olympics.
As a professional he won the bronze medal in 1978 UCI Road World Championships, behind Gerrie Knetemann and Francesco Moser. He also finished 4th over all in the 1981 Vuelta a España.
Jørgen Marcussen is married to Olympic cyclist Karina Skibby.