Admiral Horacio Rivero, Jr. (May 16, 1910 – September 24, 2000), was the first Puerto Rican and Hispanic four-star Admiral, and second Hispanic to become a full Admiral in the modern United States Navy. David Glasgow Farragut (1801–1870), a Hispanic, became the first full admiral of the Navy during the American Civil War. After retiring from the Navy, Rivero served as the U.S. Ambassador to Spain (1972–1974), and was also the first Hispanic to hold that position.