Renato Constantino (March 10, 1919 – September 15, 1999) was an influential Filipino historian. He was a member of the leftist tradition of Philippine historiography. Apart from being a historian, Constantino was also engaged in foreign service, working for the Philippine Mission to the United Nations and the Department of Foreign Affairs.
He is the father of former Civil Service Commission Chairperson Karina Constantino-David and father-in-law of University of the Philippines Diliman sociology professor emeritus Randy David.
Constantino attended the University of the Philippines where he became the youngest editor of the University's student publication, The Philippine Collegian. He wrote editorial columns criticizing President Manuel Quezon, which earned the attention of the President by responding to the article in one of his speeches. When the Second World War erupted, Constantino fought in Bataan and was a member of an intelligence team spying on the Japanese. He also worked as a journalist during the war.
At the conclusion of the war, Constantino joined the Philippine Mission to the United Nations from 1946 to 1949 as its Executive Secretary. He worked as a counselor for the Department of Foreign Affairs from 1949 to 1951. These exposures to foreign service became the foundations of a book he wrote about the United Nations.
Constantino held professorial positions at the University of the Philippines (Diliman and Manila), Far Eastern University, Adamson University, and Arellano University. He was also a visiting lecturer in universities in London, Sweden, Japan, Germany, Malaysia and Thailand. He served as a member of the Editorial Board of the Journal of Contemporary Asia, and Trustee of Focus on the Global South in Bangkok.