Algiers, officially known as Capital City of Algiers, is the capital city of Algeria. It is situated on the Mediterranean Sea in the north-central portion of the country. The city serves as the capital of the Algiers Province and extends over many communes without possessing its own separate governing body.
Geographically, Algiers is located along the Bay of Algiers and is surrounded by the Mitidja Plain and major mountain ranges. It is the largest city in Algeria and ranks as the third-largest city on the Mediterranean, the sixth-largest city in the Arab world, and the 29th-largest city in Africa by population. As of 2025, the urban area has an estimated population of 4.325 million people.
The city's favorable location historically established it as a center for both Ottoman and French influences. These historical factors have shaped Algiers into a diverse metropolis.