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. B…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. 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.