Robert Rich may refer to:
- Robert Rich, 1st Earl of Warwick (1559–1619), English nobleman
- Robert Rich, 2nd Earl of Warwick (1587–1658), English naval officer and politician
- Robert Rich, 3rd Earl of Warwick (1611–1659)
- Sir Robert Rich, 2nd Baronet (c. 1648–1699), English Member of Parliament and a Lord of the Admiralty
- Sir Robert Rich, 4th Baronet (1685–1768), British field marshal
- Sir Robert Rich, 5th Baronet (1717–1785), British general
- Robert E. Rich Sr. (1913–2006), inventor of non-dairy whipped topping, founder of Rich Products
- Robert E. Rich Jr. (born 1941), chairman of Rich Products Corporation
- Robert E. Rich (born 1926), American intelligence official
- Robert F. Rich (1883–1968), politician from Pennsylvania
- Robert G. Rich Jr. (born 1930), U.S. Ambassador to Belize
- Robert Rich (musician) (born 1963), American ambient musician
- Robert Rich, pen name used by American screenwriter and novelist Dalton Trumbo (1905–1976) because of blacklisting