Malabo ( /məˈlɑːboʊ/) is the capital of Equatorial Guinea, located on the northern coast of Bioko Island (formerly Fernando Pó) on the rim of a sunken volcano.. With a fast growing population of 155,963 (2005) it is also the second largest city in the country, after Bata in Río Muni on the African mainland.

The city was first founded by the British in 1827, who leased the island from Spain during the colonial period. Named Port Clarence, it was used as a naval station in the effort to suppress the slave trade. Many newly freed slaves were also settled there, prior to the establishment of Liberia as a colony for freed slaves. While many of them later relocated to Sierra Leone, some of their descendants, called Fernandinos, can still be found in Malabo and the surrounding area, where they constitute a distinct ethnic group, speaking their own Afro-Portuguese pidgin dialect.

When the island reverted to complete Spanish control, Malabo was renamed Santa Isabel. It was chosen to replace the mainland city of Bata as the capital of the country in 1969, and was renamed Malabo in 1973 as part of President Francisco Macías Nguema's campaign to replace European place names with "authentic" African ones.