Massachusetts, nickname "Bay State," a U.S. state with shores on Massachusetts Bay, Cape Cod Bay, Buzzards Bay and Narragansett BayBay State Conference, a high school athletic conference in MassachusettsBay State (TV series), the Boston University-produced soap operaBay State Road, a street on the Boston University campusBay State (musical instrument brand), a brand of musical instrument made in the 19th century by John C. Haynes & Co.Baystate, a Japanese jazz record label reference
