1940 Turkish National Division
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