The Constitution of the Commonwealth of Massachusetts is the fundamental governing document of the Commonwealth of Massachusetts, one of the 50 individual state governments that make up the United States of America. It was drafted by John Adams

John Adams

John Adams was an American lawyer, statesman, diplomat and political theorist. A leading champion of independence in 1776, he was the second President of the United States...

, Samuel Adams

Samuel Adams

Samuel Adams was an American statesman, political philosopher, and one of the Founding Fathers of the United States. As a politician in colonial Massachusetts, Adams was a leader of the movement that became the American Revolution, and was one of the architects of the principles of American...

, and James Bowdoin

James Bowdoin

James Bowdoin II was an American political and intellectual leader from Boston, Massachusetts during the American Revolution. He served in both branches of the Massachusetts General Court in the colonial era and was president of the state's constitutional convention...

 during the Massachusetts Constitutional Convention between September 1 and October 30, 1779. Following approval by town meetings, the Constitution was ratified on June 15, 1780, became effective on October 25, 1780, and remains the oldest functioning written constitution in continuous effect in the world.
The Massachusetts Constitution was the last of the first set of the state constitutions to be written.