The Constitution of the Philippines (Filipino: Saligang Batas ng Pilipinas or Konstitusyon ng Pilipinas, Spanish: Constitución de la República de Filipinas) is the constitution or supreme law of the Republic of the Philippines. Its final draft was completed by the Constitutional Commission on October 12, 1986, and was ratified by a nationwide plebiscite on February 2, 1987.

Three other constitutions have effectively governed the country in its history: the 1935 Commonwealth Constitution, the 1973 Constitution, and the 1986 Freedom Constitution.

The earliest constitution establishing a "Philippine Republic", the 1899 Malolos Constitution, was never fully implemented throughout the Philippines and did not establish a state that was internationally recognized, due in great part to the eruption of the Philippine–American War.