Equatorial Guinea, officially the Republic of Equatorial Guinea, is a small country located in Central Africa, with an area of 28,000 square kilometres. It has two parts, an insular and a mainland region. The insular region consists of the islands of Bioko in the Gulf of Guinea and Annobón, a small volcanic island south of the equator. Bioko Island is the northernmost part of Equatorial Guinea and is the site of the country's capital, Malabo. The island nation of São Tomé and Príncipe is located between Bioko and Annobón. The mainland region, Río Muni, is bordered by Cameroon on the north and Gabon on the south and east. It also includes several small offshore islands.
Formerly the colony of Spanish Guinea, its post-independence name evokes its location near both the equator and the Gulf of Guinea. Apart from the Spanish territories of Canary Islands, Ceuta and Melilla on the coast of Morocco, and Sahrawi Arab Democratic Republic, it is the only country in Africa whose de jure official language is Spanish.