Algiers (/ælˈdʒɪərz/ al-JEERZ; Arabic: الجزائر, romanized: al-Jazāʾir; Berber languages: Dzayer; French: Alger, [alʒe]) is the capital and largest city of Algeria. The city's population at the 2008 Census was 2,988,145[3] and in 2020 was estimated to be around 4,500,000. Algiers is located on the Mediterranean Sea and in the north-central portion of Algeria.
Algiers is situated on the west side of a bay of the Mediterranean Sea. The modern part of the city is built on the level ground by the seashore; the old part, the ancient city of the deys, climbs the steep hill behind the modern town and is crowned by the Casbah or citadel (a UNESCO World Heritage Site),[4] 122 metres (400 ft) above the sea. The casbah and the two quays form a triangle.