Robert Cornthwaite may refer to:
Robert Cornthwaite (bishop) (1818–1890), English prelate of Roman Catholic Church Robert Cornthwaite (actor) (1917–2006), American film and TV character performer Robert Cornthwaite (soccer) (born 1985), English-Australian centre-back
See also Robert Cornthwaite Streatfeild (1894–1976), English priest who served as Dean of Nassau, Bahamas