William Corless Mills, American historian and curator (d. 1928)
William Corless Mills (January 2, 1860 - January 17, 1928) was a US museum curator.

Mills was born in Pyrmont, Ohio.

Mills specialized in Native American remains, leading excavations in Adena Mound, Ohio (1901)

Mills was the fourth curator and librarian of the Ohio State Archaeological and Historical Society (1898–1928), following Lucy Allen Smart. He also was

member of the American Ornithological Union

member and librarian of the Ohio Academy of Science

member and president of the Wheaton Ornithological Society

member and treasurer of the Columbus Horticultural Society

charter member of the American Association of Museums (now the American Alliance of Museums)

member of the Columbus Iris Society

member of the National Research Council of Archaeology

fellow of the American Ethnological Society

fellow of the American Association for the Advancement of Science

fellow of the American Anthropological Society

assistant editor of the Ohio Naturalist

lecturer in Sociology in the College of Commerce and Administration of the Ohio State UniversityMills died in Columbus, Ohio.