Robert Keller may refer to:
Robert Keller (botanist) (1854–1939), Swiss botanist Robert Keller (music editor) (1828–1891), German music editor Robert J. Keller (1893–1944), member of the Wisconsin State Assembly Robert P. Keller (1920–2010), general in the Marine Corps USS Robert F. Keller, a John C. Butler-class destroyer escort in the United States Navy Bob Keller (1937–2025), American basketball player