Massachusetts voted for Democratic nominee Michael Dukakis, the state's governor, over Republican Vice President George H. W. Bush.
Dukakis, the sitting governor of Massachusetts, won his home state with 53.23% of the vote to Bush's 45.38%, a 7.85% margin of victory.
This made it one of ten states (plus the District of Columbia) to vote for Dukakis, even though Bush won a convincing electoral victory nationwide.
Not only has it continued to vote Democratic in every presidential election that followed, but no Republican since has broken 40% in Massachusetts, or even won a single county or congressional district in the state.
As of 2020, this was the last time that the cities of Amesbury, Attleboro, Beverly, Braintree, Brockton, Franklin, Leominster, Marlborough, and Methuen and the towns of Abington, Alford, Auburn, Avon, Ayer, Barnstable, Bedford, Bernardston, Bolton, Boxborough, Buckland, Burlington, Canton, Carlisle, Charlemont, Chelmsford, Clinton, Cummington, Danvers, Dedham, Dennis, Erving, Essex Gosnold, Grafton, Groton, Hancock, Harvard, Harwich, Hawley, Holbrook, Holliston, Hopedale, Hudson, Ipswich, Littleton, Longmeadow, Manchester-by-the-Sea, Mansfield, Marblehead, Marion, Mattapoisett, Medway, Milton, Mount Washington, Needham, New Ashford, New Salem, Newbury, Northborough, Norton, Peru, Petersham, Plymouth, Reading, Savoy, Sheffield, Shelburne, Shirley, Shrewsbury, Southborough, Southampton, Stow, Sudbury, Wakefield, Wellesley, West Newbury, Westborough, Westford, Westhampton, Weston, Winchester, Windsor, and Yarmouth voted Republican.