The canton of Boulogne-sur-Mer-Sud is a former canton situated in the department of the Pas-de-Calais and in the Nord-Pas-de-Calais region of northern France.

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

It had a total of 22,763 inhabitants (2012, without double counting).

The canton comprised 5 communes:[1]

This Pas-de-Calais geographical article is a stub.