- Source: Willumsen
Willumsen is a surname. Notable people with the surname include:
Charles Willumsen (1918–1984), Danish rower
Dorrit Willumsen (born 1940), Danish writer
Jens Ferdinand Willumsen (1863–1958), Danish artist, architect and photographer
Willumsens Museum, in Frederikssund, Denmark
Mary Willumsen (1884–1961), Danish photographer