Gilbert Dennison Harris (October 2, 1864 – December 4, 1952) was an American geologist and paleontologist. He was a professor of paleontology and stratigraphic geology at Cornell University and proprietor and editor of two scientific journals, Bulletins of American Paleontology and Palaeontographica Americana.[1][2] Harris later left Cornell and founded the Paleontological Research Institution, an independent organization dedicated to research and education in the field of paleontology.