Rafael Segundo Sotomayor Gaete (November 16, 1848 – February 16, 1918) was a Chilean politician and several times minister. He was born in Cauquenes, the son of Rafael Sotomayor Baeza and of Pabla del Carmen Gaete Ruiz. He studied at the Instituto Nacional and later graduated as a lawyer from the Universidad de Chile on January 7, 1871. During the War of the Pacific, he accompanied his father, who was the Minister of War, as personal secretary and auditor, and after his death, in 1880, he became CO of the Customs House Guard in Iquique and later Intendant of Tarapacá. On May 4, 1895, he married Inés Neuhaus Ugarteche, and together they had 6 children.