Başakşehir is one of the 39 second-level districts in Greater Istanbul, Turkey. The population of Başakşehir is 311,095 as of 2012. It is in the European part of Istanbul.
Başakşehir is situated in the European portion (Rumeli) of İstanbul at 41°05′N 28°49′E. Sazlıdere Dam reservoir is to the northwest and Sea of Marmara is to the south. It is surrounded by other second-level districts of Istanbul, such as Eyüp, Sultangazi, Esenler, Bağcılar, Küçükçekmece, Avcılar, Esenyurt and Arnavutköy. (Istanbul is one of the 30 metropolitan centers in Turkey with more than one municipality within city borders.)
Former name of the area was Azatlık. The area specialized in providing gunpowder to the Ottoman army. Later a farm was established in place of Azatlık; the farm was known as Resneli farm referring to Resneli Niyazi, a military officer from Resen, Macedonia (then a part of Ottoman Empire), who was a hero of Young Turk Revolution in 1908. Up to 2009 most of Başakşehir was a quarter in Küçükçekmece district. Then it was declared a district seat.
Atatürk Olympic Stadium
Başakşehir Fatih Terim Stadium