Graeme Mercer Adam (May 25, 1839 – October 30, 1912) was a Canadian author, editor, and publisher.

He shortly teamed with a partner to form Rollo & Adam, which ventured into publishing.

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.

[1] In 1891 Adam published a book "to Mark the Hundredth Anniversary of the Passing of the Constitutional Act of 1791, which Set Apart the Province of Upper Canada and Gave Birth to York", entitled "Toronto, Old and New..."[2]