When the language border was determined in 1963, part of the then municipality of Twee Akren, in the Arrondissement of Soignies, was added to the arrondissement.

In 1977, the then-municipality of Sint-Maria-Oudenhove ceased to exist when merged with the municipalities of Zottegem and Brakel.

As a result, the part of Sint-Maria-Oudenhove which was merged with Brakel was ceded to the Arrondissement of Oudenaarde.

The Administrative Arrondissement of Aalst consists of the following municipalities:

This East Flanders location article is a stub.