The 1905–06 İstanbul Football League season was the second season of the league. Cadi-Keuy FC won the league for the first time.
Season
References 1905-1906 İstanbul Futbol Ligi. Türk Futbol Tarihi vol. 1. page(29). (June 1992) Türkiye Futbol Federasyonu Yayınları.