The Piraeus Football Clubs Association (Greek: Ένωση Ποδοσφαιρικών Σωματείων Πειραιώς, abbreviated E.P.S.P.

[1] It was the second largest football association in Greece and was officially recognized by FIFA alongside E.P.S.

After the establishment of Alpha Ethniki it became the Piraeus Football Clubs Association for amateurs.

In the early years they were a great opponent of Ethnikos Piraeus, who won the championship of 1928, while the two clubs tied in 1930 and were declared both champions.

Ethnikos Piraeus also won the Championship in 1939, the only time Olympiacos participated and lost from another team.