Lagos, usually referred to as Lagos State to distinguish it from Lagos Metropolitan Area, is a state located in the southwestern geopolitical zone of Nigeria. The smallest in area of Nigeria's 36 states, Lagos State is arguably the most economically important state of the country, containing Lagos, the nation's largest urban area. The actual population total is disputed between the official Nigerian Census of 2006, and a much higher figure claimed by the Lagos State Government. Lagos State is located in the south-western part of the Nigerian Federation. On the North and East it is bounded by Ogun State. In the West it shares boundaries with the Republic of Benin. Behind its southern borders lies the Atlantic Ocean. 22% of its 3,577 km² are lagoons and creeks.