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 (politician) (1906–1997), Norwegian politician Arthur Arntzen (writer) (1937–2025), Norwegian journalist, humorist, actor and writer Charles Arntzen, American plant molecular biologist Emilie Hegh Arntzen (born 1994), Norwegian handball player Haakon Arntzen, Canadian politician Heinrich Arntzen (1894–unknown), German flying ace during World War Holly Arntzen, Canadian singer, dulcimer player, and pianist Jon Gunnar Arntzen (born 1951), Norwegian encyclopaedist Karelius August Arntzen (1802–1876), Norwegian politician Lloyd Arntzen (born 1927), Canadian jazz clarinettist, folk singer, and soprano saxophonist 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 politician Orie Arntzen (1909–1970), American baseball player Sture Arntzen (born 1948), Norwegian trade unionist Sven Arntzen (1897–1976), Norwegian barrister
See also Arntzen de Besche, Norwegian business law firm