The governor of the Commonwealth of Massachusetts is the chief executive officer of the government of Massachusetts. The governor is the head of the state cabinet and the commander-in-chief of the commonwealth's military forces.

The Commonwealth of Massachusetts is governed by a set of political tenets laid down in its state constitution. Legislative power is held by the bicameral General Court, which is composed of the Senate and House of Representatives. The governor exercises executive power with other independently elected officers: the Attorney General, Secretary of the Commonwealth, and Auditor. The state's judicial power rests in the Supreme Judicial Court, which manages its court system. Cities and towns act through local governmental bodies to the extent that they are authorized by the Commonwealth on local issues, including limited home-rule authority. Although most county governments were abolished during the 1990s and 2000s, a handful remain.