Boston is in the United States.
Boston . One of the oldest cities in the United States , Boston was founded on the Shawmut Peninsula in 1630 by Puritan settlers from England . Boston 's many firsts include the United States ' first public school , Boston Latin School ( 1635 ) , first subway system , the Tremont Street Subway ( 1897 ) , and first public park , Boston Common ( 1634 ) . Boston Latin School . Established on April 23 , 1635 , it is the oldest school as well as the first public school in the United States . Suffolk County is a county in the Commonwealth of Massachusetts , in the United States .