Graeme Mercer Adam (May 25, 1839 – October 30, 1912) was a Canadian author, editor, and publisher.
Adam was born in Scotland where he developed a deep interest in publishing. He moved to Toronto to run a bookstore. He shortly teamed with a partner to form Rollo & Adam, which ventured into publishing. Their first significant publication was entitled British American Magazine. It was edited by Henry Youle Hind, a geologist and writer about the Canadian northwest. The publication, although short-lived, was the first of a long series of important Canadian periodicals published by Adam.