In July 1959 Spanish Guinea was divided into two overseas provinces of Spain: Rio Muni (now Mbini), on the African mainland, and the island of Bioko with other nearby islands.

• 1959年被划分为西班牙的两个海外省：位于非洲大陆的姆比尼地区为1个省，比奥科岛及附近岛屿组成另1个省。