Dominion was a national chain of supermarkets in Canada, which was known as the Dominion of Canada when the chain was founded. The chain was founded in 1919 in Ontario and was later acquired by the Argus Corporation. It was later sold to The Great Atlantic & Pacific Tea Company (A&P), which restricted the chain to the Greater Toronto Area. Stores outside Ontario were converted to the A&P banner or sold to third parties. A&P's Canadian division was later acquired by Metro Inc., which rebranded the remaining Dominion stores to its namesake banner in 2008.

The Argus Corporation was an investment holding company based in Toronto, Ontario. During the 1960s and 1970s, it was the most powerful and best known conglomerate in Canada, at one time controlling the companies making up 10 percent of all shares traded daily on the Toronto Stock Exchange.