Athletische Sportvereniging Oostende Koninklijke Maatschappij was a Belgian football club from the city of Ostend, West Flanders until its merger with VGO Oostende to form K.V.

It was founded in 1911 as Association Sportive Ostendaise (in French).

Eleven years later it took part to the second division until 1926 when it was decided to reduce the number of leagues at that level from two to one.

But in 1973 and in 1974 Oostende promoted twice and was thus back at the top level.

This article about a Belgian association football club is a stub.