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