Altay Spor Kulübü is a Turkish professional football club based in the city of İzmir.
Formed in 1914, Altay are nicknamed Büyük Altay (Great Altay). The club colors are black and white, and they play their home matches at the Alsancak Mustafa Denizli Stadium.
Domestically, the club has finished third place for the Süper Lig three times and have won the Turkish Cup twice. They hold the record for most İzmir Football League titles with 14. They are the most successful İzmir-based club with 16 championships in various competitions.
Altay was founded in 1914 in İzmir as İstiklal. The initial aim of the club was to unite Turkish youth under sporting activities and to encourage them, because in the 1910s minorities dominated sporting activities in İzmir. Under Ottoman rule, Turkish footballers were unable to compete. Altay was supported by many prominent Turkish politicians of the era. Former Turkish President Celal Bayar worked very hard in founding the club and gave his full support.[citation needed]