Robert Duncan
Robert Duncan may refer to:
- Robert Duncan (poet) (1919–1988), U.S. poet
- Robert Duncan (composer), U.S. composer
- Robert Duncan (physicist), U.S. physicist
- Robert Duncan (actor) (born 1952), British TV actor
- Robert Duncan McNeill (born 1964), U.S. actor, director and producer
- Robert Duncan (bishop) (born 1948), Episcopal bishop of Pittsburgh
- Robert Duncan (journalist) (born 1962), U.S. journalist based in Spain, editor of Santificarnos Spero News and EnerPub
- Robert C. Duncan, British Olympic athlete
- Robert M. ("Mike") Duncan, 2007 RNC Chairman