•
Robert Alexander (United States Army officer) (1863–1941), American major general in World War I •
Robert Alexander (barrister) (1795–1843), British philanthropist •
Robert P. Alexander (1904–1985), collector and expert on Japanese classic postage stamps •
Robert Alexander (photographer) (1943–1989), American photographer •
Robert J. Alexander (1918–2010), scholar at Rutgers University •
Robert McNeill Alexander (1934–2016), British zoologist, and professor at University of Leeds •
Robert William Alexander (1905–1979), Irish writer •
Robert Alexander (artist) (1840–1923), Scottish artist •
Robert Wayne Alexander (1941–2023), American biologist •
Robert Alexander (priest) (1788–1840), Anglican priest in Ireland ==See also==