The MayFlower Compact was the first governed document.
The first written document that provided self government for the pilgrims was The Mayflower Compact.
That document was called the Articles of Confederation.
Constitution
Mayflower Compact
Articles of Confederation
The first document written to govern u.s.a was The Articles of Conferderation.
The Articles of Confederation
Articles of Confederation
The Articles of Confederation was the first form of National Government For the independent states.
The first document which formally looks like what is now thought of as a "constitution" is the original United States Constitution. This is the first real document which explicitly (and in great detail) lays out how a country's government is to actual work. In terms of a more basic declaration of the purpose and function of government, the Magna Carta is generally considered to be the first such document.
Mayflower Compact was the first form of self-government in America.