The 1940 National Division was the fourth edition of the Turkish National Division. Fenerbahçe won their second title.
Participating clubs Beşiktaş - Istanbul Football League, 1st Fenerbahçe - Istanbul Football League, 2nd Galatasaray - Istanbul Football League, 3rd Vefa - Istanbul Football League, 4th Gençlerbirliği - Ankara Football League, 1st Muhafızgücü - Ankara Football League, 2nd Altınordu - İzmir Football League, 1st Altay - İzmir Football League, 2nd
League table
Results
References Erdoğan Arıpınar; Tevfik Ünsi Artun, Cem Atabeyoğlu, Nurhan Aydın, Ergun Hiçyılmaz, Haluk San, Orhan Vedat Sevinçli, Vala Somalı (June 1992). Türk Futbol Tarihi (1904-1991) vol.1, Page(81), Türkiye Futbol Federasyonu Yayınları.