Algeria is the largest country in Africa, Maghreb and the Arab World. The country is bordered in the northeast by Tunisia, in the east by Libya, in the west by Morocco, in the southwest by Western Sahara, Mauritania, and Mali, in the southeast by Niger, and in the north by the Mediterranean Sea. Its size is almost 2,400,000 square kilometres with an estimated population of 37.1 million as of 2012.