Politics and the law
- Robert Hunter Morris (1700–1764), lieutenant governor of Colonial Pennsylvania
- Robert Morris (judge) (1745–1815), American federal judge
- Robert Morris (MP) (died 1816), English politician
- Robert H. Morris (mayor) (1808–1855), mayor of New York City
- Robert Morris (lawyer) (1823–1882), early African-American attorney
- Page Morris (Robert Page Waller Morris, 1853–1924), U.S. representative from Minnesota
- Robert J. Morris (1914–1996), anti-Communist crusader, lawyer and politician
- Robert Morris (Denver mayor) (1838–1917), mayor of Denver, Colorado
- Robert Morris (Indiana politician), member of the Indiana House of Representatives
- Robbie Morris (politician), member of the West Virginia Senate
Arts and entertainment
- Robert Morris (artist) (1931–2018), American modern artist
- Robert Morris (actor) (born 1940), British actor
- Robert Morris (composer) (born 1943), British and American composer
- Robert Morris (author) (born 1950), American author
- Colonel Robert Morris (1954–2013), American musician
- Bob Morris (musician) (born 1985), songwriter, singer, and guitarist of the band Stamps
- Robert Lee Morris (born 1947), German-born jewelry designer
- Robert Michael Morris (1940–2017), American actor
Sports
- Robert Morris (Welsh footballer) (1875–1926), Welsh international footballer
- Robert Morris (basketball) (1902–1986), college and professional basketball coach
- Robert Morris (English footballer) (1913–?), English footballer
- Robert Morris (cricketer) (1926–2007), Welsh cricketer
- Bob Morris (racing driver) (born 1948), touring car racer, winner of 1976 Bathurst 1000
- Rob Morris (American football) (born 1975), retired American football linebacker
- Robbie Morris (born 1982), English rugby union player
- Bob Morris (football manager), 21st century Papua New Guinean football manager
Other fields
- Robert Morris (1703–1754), an English writer who wrote about architecture
- Robert Murray Morris (1824–1896), an officer who served in the U.S. Army and the Union Army
- Robert Tuttle Morris (1857–1945), an American surgeon
- Robert Schofield Morris (1898–1964), a Canadian architect
- Robert Morris (1932–2011), an American cryptographer and former chief scientist at the National Security Agency
- Robert L. Morris (1942–2004), the first person to hold the Koestler Chair of Parapsychology at the University of Edinburgh
- Robert Morris (1943–2022), an English historian
- Robert Tappan Morris (born 1965), the son of a cryptographer and creator of the first Internet worm
- Robert Morris (mathematician), a mathematician who lived in the 21st century