Willemsen

Willemsen may refer to:


 * August Willemsen (1936–2007), Dutch translator of Portuguese and Brazilian literature
 * Daniël Willemsen (born 1975), Dutch sidecarcross rider and nine times World Champion
 * Elfje Willemsen (born 1985), Belgian bobsledder who has competed since 2007
 * Madeline Willemsen (1915–1982), Puerto Rican actress and comedian
 * Marcel Willemsen (born 1977), Dutch sidecarcross passenger and 1999 World Champion
 * Mike Willemsen (born 1996), Dutch DJ, record producer, musician
 * Roger Willemsen (1955–2016), German author, essayist and TV presenter