Robert B. Smith may refer to:
Robert B. Smith (Virginia mayor) (fl. mid-20th century), American politician Robert Bache Smith (1875–1951), American librettist and lyricist Robert Barr Smith (1824–1915), Australian businessman and philanthropist Robert Benjamin Smith (born 1962), American football player Robert Benjamin Smith (1948–2024), American mass murderer Robert Bert Smith, American football defensive back Robert Black Smith (1872–1931), member of the Legislative Assembly of New Brunswick Robert Bruce Smith IV (1945–2014), American music and history expert Robert Burdett Smith (1837–1895), solicitor and politician in colonial New South Wales Robert Burns Smith (1854–1908), American politician, Governor of Montana
See also Robert Barnwell Smith (1800–1876), known as Robert Barnwell Rhett, U.S. Senator and Representative from South Carolina Robert Benedict Seymour Smith (1909–1993), New Zealand rower Robert Smith (disambiguation)