Algeria, officially the People's Democratic Republic of Algeria, is a sovereign state in North Africa on the Mediterranean coast. The capital and most populous city is Algiers, located in the far north of the country. With an area of 2,381,741 square kilometres (919,595 sq mi), Algeria is the tenth-largest country in the world, and the largest in Africa since South Sudan became independent from Sudan in 2011. Algeria is bordered to the northeast by Tunisia, to the east by Libya, to the west by Morocco, to the southwest by the Western Saharan territory, Mauritania, and Mali, to the southeast by Niger, and to the north by the Mediterranean Sea. The country is a semi-presidential republic consisting of 48 provinces and 1,541 communes (counties).