Mars Canada Ltd is the Canadian division of Mars, Incorporated, a privately held multi-national company and a world leader in food, pet care products, and confectionery products.

The Canadian division began its operation in the late 1940s as a branch of Uncle Ben's Inc.

[2] In that same year, Effem was selected as one of Canada's Top 100 Employers, as published in Maclean's magazine.

[3] Mars Canada's National Office is located in Bolton, Ontario, 20 minutes north of Pearson International Airport.

The confectionery manufacturing facility is located in Newmarket, Ontario, 40 minutes north-east of the National Office.