James Dennis may refer to: James Dennis, 1st Baron Tracton (1721–1782), lord chief baron of the Exchequer in Ireland James Dennis (athlete) (born 1976), American discus thrower James Blatch Piggott Dennis (1815–1861), British paleontologist James L. Dennis (born 1936), American judge James U. Dennis (1823–1900), American politician and lawyer
See also James Dennis House, historic building in Rhode Island, United States