The Canton of Aix-en-Provence-IV or Aix-en-Provence-Sud-Ouest is a former canton in the Bouches-du-Rhône department of France.

It was created 27 February 2003 by the decree 2003-156.

[1] It was disbanded following the French canton reorganisation which came into effect in March 2015.

At 70,749 inhabitants (2012), it was the most populous canton in France.

[2] Elected to represent the canton in the General Council of Bouches-du-Rhône: The canton is made up of the following communes:[2]