Samuel John Moore (August 3, 1859 – 1948) was a Canadian businessman, founder of Moore Corporation Limited.
He was born in England in 1859 and came with his family to Barrie, Ontario while still young. When he was 12, he found work at the Barrie Examiner as a printer's assistant, later becoming local editor. He worked in Texas, then returned to found Grip, a satirical weekly journal, with J. W. Bengough. In 1882, Moore left to found Moore Business Forms, which sold books of sales slips with flip-over carbon paper. The company, later Moore Corporation Limited, went on to become a major supplier of business forms and printing services in North America. Other affiliated companies were formed in the United Kingdom and Australia. Moore also founded the Metropolitan Bank of Canada in 1902; it was merged with Scotiabank, where Moore served as president and chairman of the board. He played an important role in the development of the YMCA in Canada and was a major supporter of the Canadian Baptist Church.
Moore Corporation Limited merged with Wallace Computer Services in 2003 to form MooreWallace, which was subsequently acquired by R. R. Donnelley & Sons Company.