Estimate population 10,210,200 - Capital City N'Djamena
Chad covers 1,284,000 square kilometres (495,800 square miles). In the Saharan territories of the north, the Tibesti mountains have extinct volcanic peaks that reach 3,415 metres (11,204 feet). The Ennedi and Wadai plateaus along the eastern border with Sudan have peaks that reach 600 metres (1,969 feet).
To the south and west the land slopes to the Bodele depression and Lake Chad basin. The rain that falls in the south part of Chad drains into the Shari and Congo, or Zaire, rivers. The northern two thirds of the country is in the hot arid Sahara desert. The official languages are French and Arabic, but many other languages are spoken.