The 1920 Argentine Primera División was the 29th season of top-flight football in Argentina. The AFA season began on March 21 and ended in January 1921 while the AAmF began on March 28 and also ended in January 1921.

The 1920 Copa Aldao was the final match to decide the winner of the Copa Aldao, the sixth edition of the international competition organised by the Argentine and Uruguayan Associations together. The final was contested by the same teams than the previous edition, Uruguayan Nacional and Argentine Boca Juniors.