McKinley was able to win 13 out of the 14 counties in the state of Massachusetts. The only county that went to Bryan was Suffolk County, home to the state's capital and largest city, Boston. Bryan had previously lost the county to McKinley in 1896 and would lose it again to William Howard Taft in 1908. Bryan had previously lost Massachusetts to McKinley four years earlier and would later lose the state again to Taft in 1908.
Results
1900 United States presidential election in Massachusetts[2]