David Arnott is an American actor, screenwriter and composer.
David Arnott may also refer to:
- David Arnott (minister) (born 1945), Moderator of the General Assembly of the Church of Scotland
- David Arnott (marine engineer), winner of the David W. Taylor Medal
- David Arnott (politician) (1899–1960), Australian politician
- David Whitehorn Arnott (1915-2004), British scholar of African languages