'''Chad''' (;  , ; , ), officially known as the '''Republic of Chad''' ( ''''; ), is a landlocked country at the crossroads of north-central Africa. Chad is bordered by Libya to the north, Sudan to the east, the Central African Republic to the south, Cameroon to the south-west, Nigeria to the southwest (at Lake Chad), and Niger to the west. It has a population of 16 million, of which 1.6 million live in the capital and largest city N'Djamena.