Marcussen is a surname. Notable people with the surname include:
Hanna Elise Marcussen, Norwegian politician
Ida Marcussen, Norwegian heptathlete
Jan Marcussen, American Seventh-day Adventist and former minister
Jens Marcussen, Norwegian politician
Jørgen Marcussen, Danish racing cyclist
Peder Marcussen, Danish gymnast
Sigurd Marcussen, Norwegian politician
Stephen Marcussen, chief mastering engineer
Paul Marcussen, Norwegian financial analyst
