The Constitution of the Commonwealth of Puerto Rico (Spanish: Constitución del Estado Libre Asociado de Puerto Rico) is the controlling government document of Puerto Rico. It is composed of nine articles detailing the structure of the government as well as the function of several of its institutions. The document also contains an extensive and specific bill of rights. It was ratified by Puerto Rico's electorate in a referendum on March 3, 1952, and on July 25, 1952, Governor Luis Muñoz Marín proclaimed that the constitution was in effect. July 25 is known as Constitution Day.

The United States maintains ultimate sovereignty over Puerto Rico. Under this Constitution, Puerto Rico officially identifies as the Commonwealth of Puerto Rico.