The arrondissement of Boulogne-sur-Mer is an arrondissement of France in the Pas-de-Calais department in the Hauts-de-France region.

[2] Its population is 157,817 (2021), and its area is 633.7 km2 (244.7 sq mi).

[3] The communes of the arrondissement of Boulogne-sur-Mer, and their INSEE codes, are:[2] The arrondissement of Boulogne-sur-Mer was created in 1800.

[6] As a result of the reorganisation of the cantons of France which came into effect in 2015, the borders of the cantons are no longer related to the borders of the arrondissements.

The cantons of the arrondissement of Boulogne-sur-Mer were, as of January 2015:[7]