Eritrea, officially the State of Eritrea, is a country in the Horn of Africa. It is bordered by Sudan in the west, Ethiopia in the south, and Djibouti in the southeast. The east and northeast of the country have an extensive coastline on the Red Sea, directly across from Saudi Arabia and Yemen. The Dahlak Archipelago and several of the Hanish Islands are part of Eritrea. Its size is just under 118,000 km2 (45,560 sq mi) with an estimated population of 5 million. The capital is Asmara.