Shaw's and Star Market are two American supermarket chains under united management based in West Bridgewater, Massachusetts, employing about 30,000 associates in 150 total stores; 129 stores are operated under the Shaw's banner in Maine, Massachusetts, New Hampshire, Rhode Island, and Vermont, while Star Market operates 21 stores in Massachusetts, most of which are in or near Boston. Until 2010, Shaw's operated stores in all six New England states, and as of 2021 Shaw's remained the only supermarket chain with stores in five of the six, after it sold its Connecticut operations. The chain's largest competitors are Hannaford, Market Basket, Price Chopper, Roche Bros., Wegmans, and Stop & Shop. Star Market is a companion store to Shaw's, Shaw's having purchased the competing chain in 1999.

DeMoulas Super Markets, Inc., under the trade name Market Basket, is a chain of 88 supermarkets in New Hampshire, Massachusetts, Maine, and Rhode Island in the United States, with headquarters in Tewksbury, Massachusetts.