The Istanbul Friday League was founded in 1912, and replaced the Istanbul Sunday League in 1915. Seven clubs took part in the league when it was first founded in 1912: Anadoluspor, Darülfünun, Terbiye-i Bedeniye, Türk İdman Ocağı, Mümaresatı Bedeniye, Şehremini, and Fenerbahçe S.K.
Champions
Galatasaray SK 1915-16 ChampionIstanbul Friday League - Altınordu İdman Yurdu 1916-17 and 1917-18 ChampionFenerbahce SK 1921-22 ChampionGalatasaray SK 1921-22 ChampionFenerbahce SK 1922-23 Champion