Robert Vansittart may refer to:
- Robert Vansittart, 1st Baron Vansittart (1881–1957), British diplomat
- Robert Vansittart (judge) (1728–1789), British jurist and member of the Hellfire Club
- Robert Vansittart, son of Henry Vansittart, Governor of Bengal, 1759–64, credited with scoring the first recorded century in cricket in India <!-- [http://content-uk.cricinfo.com/wisdenalmanack/content/story/152361.html] -->