Arnott may refer to:
- Arnott, Ontario, Canada
- Arnott, Wisconsin, United States
- Arnott (automobile), a car made by Arnott’s Garages
- Arnott's Biscuits Holdings, a subsidiary of the Campbell Soup Company of America
- Arnott's Shapes, a savoury cracker produced by Arnott's
- Arnotts (Ireland), a department store in Dublin
- Arnotts (Scotland), a department store in Glasgow
- Arnott baronets, a British baronetcy since 1896
People with the given name Arnott:
- George Arnott Walker-Arnott (1799-1868), Scottish botanist
- Robert Arnott Wilson (born 1958), group theorist
People with the surname Arnott:
- Andy Arnott (born 1973), English former professional football (soccer) player
- Archibald Arnott (1772-1855), British Army surgeon
- Caroline Arnott (died 1933), Dame Commander of the Order of the British Empire
- Drew Arnott, Canadian musician
- Jake Arnott (born 1961), British novelist
- James Fullarton Arnott, Scottish theatre professor
- Janet Arnott (21st century), Canadian curler
- Jason Arnott (born 1974), professional ice hockey center
- Joanne Arnott (born 1960), Canadian Métis writer
- John Arnott (1814-1898), Irish entrepreneur
- John Arnott (footballer) (born 1932), English former professional football (soccer) player
- Kevin Arnott (cricketer) (born 1961), former Zimbabwean cricketer
- Kevin Arnott (footballer) (born 1898), English footballer
- Melville Arnott (1909-1999), British academic
- Neil Arnott (1788-1874), Scottish physician
- Peter R. Arnott (born 1932), musician, composer, theatre director
- Ray Arnott (21st century), Australian rock drummer, singer and songwriter
- Robert Arnott (academic) (21st century), British archaeologist
- Robert D. Arnott (born 1954), American entrepreneur, investor, editor, and writer
- Simon Arnott (born 1976), former Australian rules footballer
- Struther Arnott (born 1934), Scottish academic
- Ted Arnott (born 1963), Progressive Conservative member of the Legislative Assembly of Ontario
- Walter Arnott (1863-1931), Scottish all-round sportsman
- William Arnott (politician) (1832-1907), American farmer and politician
- William Arnott (biscuit manufacturer) (1827-1901), Australian manufacturer and businessman