Federación Deportiva Obrera (Workers Sport Federation, FDO) was a sporting organisation in Argentina, made up by more than 60 football clubs.
The federation was founded in 1924, on the initiative of the Communist Party of Argentina.
FDO was led by Orestes Ghioldi and Enrique Chiarante.
FDO players boycotted interviews for newspapers where there were labour disputes.
This article about an association football-related organization is a stub.