Marcussen is a surname. Notable people with the surname include:
Hanna Elise Marcussen (born 1977), Norwegian politician Ida Marcussen (born 1987), Norwegian heptathlete Jan Marcussen, American Seventh-day Adventist and former minister Jens Marcussen (1926–2007), Norwegian politician Jørgen Marcussen (born 1950), Danish racing cyclist Peder Marcussen (1894–1972), Danish gymnast Sigurd Marcussen (1905–2006), Norwegian politician Stephen Marcussen, chief mastering engineer
See also Marcussen & Søn, a Danish organ building company