Robert Whitaker or Whittaker may refer to:
- Robert Whitaker (author), American author
- Robert Whitaker (photographer), British photographer
- Robert Whitaker (equestrian), British showjumper
- Robert Whittaker, American vegetation ecologist
- Robert Whitaker (surgeon), British author, surgeon and anatomist
- Bob Whittaker (born 1939), U.S. representative from Kansas
- Robert Whittaker (coach)
- Robert Whittaker (fighter), Australian mixed martial artist