Nigeria is a country in West Africa bordering Niger in the north, Chad in the northeast, Cameroon in the east, and Benin in the west. It is the most populous country in Africa covering an area of 923,769 square km, with a population of over 211 million. Nigeria is a federal republic comprising 36 states and the Federal Capital Territory, where the capital, Abuja, is located. The largest city in Nigeria is Lagos, one of the largest metropolitan areas in the world and the second-largest in Africa. English is the official language and Naira is the operational currency. Nigeria's economy is the largest in Africa, the 25th-largest in the world by nominal GDP, and 25th-largest by PPP. Nigeria is referred to as the Giant of Africa owing to its large population and economy and is considered to be an emerging market by the World Bank. Nigeria is the 12th largest producer of petroleum in the world, the 8th largest exporter, and has the 10th largest proven reserves.
Nigeria is a founding member of the African Union and a member of many international organizations, including the United Nations, the Commonwealth of Nations, NAM, the Economic Community of West African States, and OPEC.