Sergio Osmeña Sr. CCLH was a Filipino politician who served as the fourth president of the Philippines from 1944 to 1946. He was Vice President under Manuel L. Quezon. Upon Quezon's sudden death in 1944, Osmeña succeeded him at age 65, becoming the oldest person to assume the Philippine presidency until Rodrigo Duterte took office in 2016 at age 71. A founder of the Nacionalista Party, Osmeña was also the first Visayan to become president.
Prior to his accession in 1944, Osmeña served as Governor of Cebu from 1906 to 1907, Member and first Speaker of the Philippine House of Representatives from 1907 to 1922, and Senator from the 10th Senatorial District for thirteen years, in which capacity he served as Senate President pro tempore. In 1935, he was nominated to be the running-mate of Senate President Manuel L. Quezon for the presidential election that year. The duo were overwhelmingly re-elected in 1941.
He was the patriarch of the prominent Osmeña family, which includes his son, former Senator Sergio Osmeña Jr., and his grandsons, former Senators Sergio Osmeña III and John Henry Osmeña, ex-governor Lito Osmeña and former Cebu City mayor Tomas Osmeña.