Robert Hilliard (1904–1937) was an Olympic boxer, Irish republican, Church of Ireland minister and communist.
Robert Hilliard may also refer to: Robert C. Hilliard (actor) (1857–1927), American stage actor Robert C. Hilliard (attorney), American civil rights and personal injury attorney Robert L. Hilliard (born 1925), American WWII veteran, activist, playwright, author, and communications professor
See also Bob Hilliard (Hilliard Goldsmith), American lyricist