RiabaRiaba is a town in Equatorial Guinea. It is also the 30th largest settlement in the country. It was founded in 1779 under the name of Concepción by the frigate lieutenant Guillermo Carboner. It was reestablished by the British in 1821.Location and populationIt is located in the province of Bioko Sur. In 2005, its population was estimated at 1,071.Road communicationsThe European Union and the ADB in cooperation with the Equatorial Guinean government have developed a road network on Bioko connecting Riaba with other towns such as Luba, [Equatorial Guinea|Luba] and Malabo.