Massachusetts (officially, The Commonwealth of Massachusetts) is a state in the New England region of the United States of America. Its nickame is the Bay State. Other nicknames are the Old Colony State, and less commonly the Puritan state and the Baked Bean state. On December 18, 1990, the Legislature decided that the people of the Commonwealth would be designated as Bay Staters. The United States Postal Service abbreviation for Massachusetts is MA and its traditional abbreviation is Mass.