Robert, Rob, or Bob Lucas, may refer to:
Law and politics Robert Lucas (MP), English politician, MP for Ipswich in 1406 Robert Lucas (governor) (1781–1853), American governor of Ohio, 1832–36, first governor of the Iowa Territory 1838–41 Rob Lucas (born 1953), Liberal member of the South Australian Legislative Council
Sports Robert Slade Lucas (1867–1942), English cricketer Robert Lucas (field hockey) (1922–2019), French field hockey player Bob Lucas (footballer) (1925–2010), English association football goalkeeper Robert Lucas (sailor) (born 1932), Indonesian Olympic sailor
Others Robert Lucas, 3rd Baron Lucas of Shenfield (c. 1649–1705), English nobleman and army officer Robert Lucas (writer) (1904–1984), Austrian-born writer Robert Lyall Lucas (1927–2009), English mycologist, botanist, and phytopathologist Robert S. Lucas (1930–2016), U.S. Coast Guard admiral Robert Lucas Jr. (1937–2023), American economist Robert Lucas (musician) (1962–2008), American musician in the band Canned Heat
See also Robert Lucas de Pearsall (1795–1856), English composer