Robert Turnbull may refer to:
Bob Turnbull (1894–1946), Scottish footballer Bobby Turnbull (1895–1952), English footballer Robert Turnbull (American politician) (1850–1920), U.S. Representative from Virginia Robert Turnbull (Australian politician) (c. 1819–1872), member of the Victorian Legislative Council Robert Turnbull (railway manager) (1852–1925), general manager and director of the LNWR Robert James Turnbull (1775–1833), South Carolina planter and nullification advocate