Hydra (Arabic: حيدرة, ḥaydara, pronounced [ˈħajdara]) is a commune in the province of Algiers, Algeria.

It is located in Bir Mourad Raïs district, in the plateau of western Algiers, the wealthier part of the national capital.

[1] Scuola Italiana Roma di Algeri, a private Italian international school, is in Hydra.

[3] The École japonaise d'Alger (アルジェ日本人学校, Aruje Nihonjin Gakkō), a Japanese international school, was previously located in Hydra.

[4] The Japanese government certified it on January 12, 1994 (Heisei 6), and revoked the certification on March 29, 2002 (Heisei 14)[5] Hydra is about 6 km (3.7 mi) south west of Algiers city centre.