Robert Clifford or Bob Clifford may refer to:
English nobility Robert Clifford, 1st Baron Clifford (1274–1314), English soldier and the first Lord Warden of the Marches Robert Clifford, 3rd Baron Clifford (1305–1344), second son of Robert de Clifford, 1st Baron Clifford Robert Clifford, 4th Baron Clifford (c.1330–1350), eldest son of Robert Clifford, 3rd Baron Clifford
Law Robert A. Clifford, American trial attorney Robert L. Clifford (1924–2014), Associate Justice of the New Jersey Supreme Court Robert W. Clifford (born 1937), American lawyer and Associate Justice of the Maine Supreme Judicial Court
Sport Bob Clifford (footballer) (born 1937), Australian rules footballer Bob Clifford (American football) (1913–2006), American football player and coach Robert Clifford (cricketer) (1752–1811), English cricketer Robert Clifford (footballer) (1883–?), Scottish footballer
Others Robert Clifford (MP) (died 1423), MP for Kent in 1401 Robert T. Clifford (1835–1878), American soldier and Medal of Honor recipient Bob Clifford, Australian shipbuilder, entrepreneur, and businessman
See also Clifford Roberts (1894–1977), American investment dealer and golf administrator