Place in Bissau Autonomous Sector, Guinea-Bissau Bissau Mercado de Bandim, Bissau Flag Seal Bissau Location of Bissau in Guinea-Bissau Show map of Guinea-Bissau Bissau Bissau (Africa) Show map of Africa Coordinates: 11°51′N 15°34′Wufeff / ufeff11.850°N 15.567°Wufeff / 11.850; -15.567Coordinates: 11°51′N 15°34′Wufeff / ufeff11.850°N 15.567°Wufeff / 11.850; -15.567 Country Guinea-Bissau Region Bissau Autonomous Sector Founded 1687 Area •xa0Total 77.5xa0km2 (29.9xa0sqxa0mi) Elevation 0xa0m (0xa0ft) Population (2015 census) •xa0Total 492,004 •xa0Density 5,009/km2 (12,974/sqxa0mi) ISO 3166 code GW-BS Climate Aw