Pedro Maria Sison (1885–1938) was a Senator of the Philippines, Judge of the Court of First Instance; a statesman and philanthropist. He was a delegate to the Philippine Constitutional Convention of 1935. The Municipality of Sison in Pangasinan is named after him.Sison was born in Urdaneta, Pangasinan on 18 January 1885. His father was Pedro Sison Jr. and his mother Eusebia Macasieb.In 1896, at age 11 he joined his father in fighting the Spaniards during the Philippine revolution.