Robert Wallace may refer to:

Politicians

• Robert Wallace (MP for Greenock) (1773–1855), Scottish politician, MP for Greenock, 1832–45
• Robert Wallace (Canadian politician) (1820–?), Canadian Member of Parliament
• Robert Wallace (Edinburgh MP) (1831–1899), British Member of Parliament for Edinburgh East, 1886–99
• Sir Robert Wallace (Perth MP) (1850–1939), Irish-born politician, MP for Perth, 1895–1907
• Robert M. Wallace (1856–1942), United States Representative from Arkansas
• Robert Wallace (British Army officer) (1860–1929), Irish lawyer, soldier and politician

Religious figures

• Robert Wallace (bishop) (died 1669), a Bishop of the Isles (Scotland)
• Robert Wallace (minister) (1697–1771), minister of the Church of Scotland and writer on population
• Robert Wallace (Unitarian) (1791–1850), English Unitarian minister

Others

• Robert Charles Wallace (1881–1955), Scottish-born Canadian geologist, educator, and administrator
• Robert K. Wallace, professor at Northern Kentucky University, author of Thirteen Women Strong
• Robert Strachan Wallace (1882–1961), Australian academic, Vice-Chancellor of the University of Sydney, 1928–47
• Robert Wallace (biologist), discoverer of the Madidi titi, also known as the GoldenPalace.com monkey
• Robert Wallace (poet) (1932–1999), an American poet and professor
• Robert Wallace (CIA), a former Director of the CIA’s Office of Technical Service