Arntzen is a surname. Notable people with the surname include:
Andrea Arntzen (1875–1958), Norwegian nursing teacher
Andreas Arntzen (1777–1837), Norwegian politician
Andreas Arntzen (barrister) (1928–2012), Norgwegian barrister
Arthur Arntzen (1906–1997), Norwegian politician for the Labour Party
Arthur Arntzen (humorist) (born 1937), Norwegian journalist, humorist, actor and writer
Charles Arntzen, Regents Professor at Arizona State University
Haakon Arntzen, Canadian politician
Heinrich Arntzen (born 1894), World War I flying ace credited with eleven aerial victories
Holly Arntzen prominent eco-musician focussing attention on the Salish Sea through her Music, songs and programs with school children.
Jon Gunnar Arntzen (born 1951), Norwegian encyclopaedist
Karelius August Arntzen (1802–1876), Norwegian politician
Lloyd Arntzen (born 1927), jazz clarinettist, folk singer, and soprano saxophonist from Canada
Niels Arntzen Sem (1782–1859), Norwegian politician
Ole Arntzen (1910–1973), Norwegian businessman and resistance leader
Ole Arntzen Lützow (1801–1871), Norwegian politician
Ole Arntzen Lützow-Holm (1853–1936), Norwegian priest and Conservative Party politician
Orie Arntzen (1909–1970), American Major League Baseball pitcher
Sture Arntzen (born 1948), Norwegian trade unionist
Sven Arntzen (1897–1976), Norwegian barrister
