Arnot is a surname of Scottish origin. Notable people with the surname include:
Hugo Arnot of Balcormo (1749–1786), Scottish advocate, writer and campaigner Frederick Stanley Arnot (1858–1914), Scottish missionary to Africa Lizzie Arnot (born 1996), Scottish footballer Madeleine Arnot (born 1950), sociologist Blair Arnot, skateboarder David Arnot (disambiguation), multiple people John Arnot Jr. (1831–1886), US politician Robert Page Arnot (1890–1986), British Communist politician
See also Arnott (disambiguation) Arnup, a surname