Abuja the city of Abuja had a population of 776,298, making it one of the ten most populous cities in Nigeria. According to the United Nations, Abuja grew by 139.7% between 2000 and 2010, making it the fastest growing city in the world. , the city is experiencing an annual growth of at least 35%, retaining its position as the fastest-growing city on the African continent and one of the fastest-growing in the world. As at 2016, the metropolitan area of Abuja is estimated at six million persons, placing it behind only Lagos, as the most populous metro area in Nigeria.
Abuja Jonathan expressway, some portions of which are still under construction. A direct highway link to Minna in Niger State is still under construction. The A2 expressway links Abuja with Kaduna in the north and Lokoja in the south. There are also other highway links with the outlying region, such as that linking the suburb of Dutse Alhaji with the Lower Usuma and Gurara Dams, which supply water to the city. Abuja is on the route of the planned Lagos–Kano Standard Gauge Railway, which has been completed between Abuja and Kaduna. Trains for Kaduna depart from the Idu Railway Station in