José Abad Santos y Basco was the fifth chief justice of the Supreme Court of the Philippines. He briefly served as the acting president of the Commonwealth of the Philippines and acting commander-in-chief of the Armed Forces of the Philippines during World War II, from March 1942 until his execution. Japanese forces killed him for refusing to cooperate during their occupation of the country.

The chief justice of the Philippines presides over the Supreme Court and is the highest judicial officer of the government of the Philippines. As of April 5, 2021, the position is currently held by Alexander Gesmundo, who was appointed by President Rodrigo Duterte following the early retirement of his predecessor, Diosdado Peralta, in March 2021.