Robert Phelps (1926–2013) was an American mathematician
Robert Phelps may also refer to: Robert Phelps (academic) (1808–1890), British academic Robert Phelps (wrestler) (1890–?), British wrestler Robert Phelps (pentathlete) (born 1939), British modern pentathlete Robert Phelps (pole vaulter), winner of the 1944 and 1945 NCAA DI outdoor pole vault championships