Bioko (also spelled Bioco, in Europe traditionally called Fernando Pó from the period of Spanish colonization) is an island 32 km off the west coast of Africa, and is the northernmost part of Equatorial Guinea. Its population was 260,462 at the 2001 Census and an area of . It is located off Cameroon, in the Gulf of Guinea. Its geology is volcanic; its highest peak is the Pico Basile at .