The 1931 Balkan Cup was an unofficial holding of the competition in which only three teams participated - Bulgaria, Yugoslavia and Turkey.

It was played in 30 September – 4 October 1931 (i.e. before the 1929–31 tournament had been completed) and was won by Bulgaria.

It featured three matches, all played in Stadion Slavia, Sofia.

[1] There were 13 goals scored in 3 matches, for an average of 4.33 goals per match.

3 goals 2 goals 1 goal