James Bain (August 2, 1842 – May 22, 1908) was a Scottish-Canadian bookseller, publisher, and librarian. Born in London, England, his family emigrated to Toronto when he was 6 years old. After completing his education at the Toronto Grammar School, he went to work for his father who was a stationer and bookseller. He was active in the publishing industry both in England and in Canada, joining the firm John Nimmo & Son which later became Nimmo & Bain. He returned to Canada in 1882. After managing the fledgling Canada Publishing Company, Bain was selected in 1883 to become the first chief librarian of the Toronto Public Library. He held this position until his death in 1908.