Medea or Lemdiyya is an administrative center in the middle of vine and fruit-growing district in the Tell Atlas Mountains, some 24km (15 miles) south-west of Blida. It lies 914m (3000ft) above the sea level at the foot of the Djebel Nador. Shadowed by this mountain to the northwest, the town is surrounded by fertile, well-watered soil that forms the watershed for the Wadis Chelif, Chiffa, and Isser. Located on the site of Lambdia, a Roman military post, Médéa was founded in the 10th century by Yusuf Buluggin I ibn Ziri and became capital of the Turkish beylik of Titteri in the 14th. It was occupied by Abdelkader, the Algerian national leader, in 1835 and taken by the French in 1840. Médéa was the birthplace of the French poet and playwright Jean Richepin (1849-1926). Plastic goods are manufactured there.

Population : (estimated) 120.000