Bakırköy is a municipality and district in the European part of Istanbul Province, Turkey. Its area is 29 km2, and its population is 226,685 (2022). Bakırköy lies between the D.100 highway and the coast of the Sea of Marmara. Bakırköy has a large psychiatric hospital called "Bakırköy Ruh ve Sinir Hastalıkları Hastanesi", and is an important shopping and commercial center.