Robert Rich may refer to:

• Robert Rich, 2nd Baron Rich (c. 1537–1581)
• 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 (Bermuda settler) (1585-1630), English soldier and adventurer
• Robert Rich, 3rd Earl of Warwick (1611–1659)
• Robert Rich, 5th Earl of Warwick (c. 1619–1675)
• 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 R. Rich (born 1941), professor of medicine, microbiology and medical education
• 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