The president of the Massachusetts Senate is the presiding officer. Unlike the United States Congress, in which the vice president of the United States is the ex officio president of the United States Senate, in Massachusetts, the president of the Senate is elected from and by the senators. The president, therefore, typically comes from the majority party, and the president is then the de facto leader of that party.

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.