The Town of Braintree is a suburban city in Norfolk County, Massachusetts, United States. Although officially known as a town, Braintree adopted a municipal charter, effective 2008, with a mayor-council form of government and is considered a city under Massachusetts law. The population was 35,744 at the 2010 census. The town is part of the Greater Boston area with access to the MBTA Red Line and is a member of the Metropolitan Area Planning Commission's South Shore Coalition. The first and current mayor of Braintree is Joe Sullivan.
The town of Braintree was incorporated in 1640 and named after the English town of Braintree. It comprised land that was later split into Randolph, Holbrook, and Quincy, as well as parts of Weymouth and Milton, Massachusetts. The town of Braintree was the birthplace of presidents John Adams and John Quincy Adams, as well as statesman John Hancock. General Sylvanus Thayer, the "Father of West Point" was also born in Braintree in the section of town now known as Braintree Highlands.
Braintree's population grew by over 50% during the 1920s.