Deerfield. 1 Village (1990 pop. 17,327), Cook and Lake counties, NE Ill., a residential suburb of Chicago; inc. 1903. The huge Sara Lee Bakery is its major industry, and there is other light manufacturing. 2 Town (1990 pop. 5,018), NW Mass., on the Deerfield River; inc. 1677. In a 1704 Native American attack nearly 50 inhabitants were killed; most of the survivors were taken to Canada, and some were killed on the way. Old Deerfield St. is lined with 18th-century houses. Deerfield Academy, one of the country's foremost private secondary schools, is in the town.