Robert Stein may refer to:
Bob Stein (American football) (born 1948), American football linebacker
Robert Stein (computer pioneer) (born 1946), American computer pioneer and electronic publisher
Robert Stein (explorer) (1857–1917), Prussian-American Arctic explorer
Robert Stein, Jr., comptroller for the Coalition Provisional Authority in Iraq, convicted of fraud
Robert Stein, Scottish developer of the "patent still"
Robert A. Stein (academic) (born 1939), American law school dean and American Bar Association president
Robert F. Stein, American physicist and astronomer, see Timeline of solar astronomy
Bobby Van (born Robert Jack Stein) (1928–1980) American musical actor
Robert Lawrence Stein, best-selling American author of the horror-fiction genre
Robert M. Stein, American political scientist