| Bécourt, Montreuil |
| Béalencourt, Montreuil |
| Bréxent-Énocq, Montreuil |
| Brévillers, Montreuil |
| Bourthes, Montreuil |
| Bouin-Plumoison, Montreuil |
| Boubers-lès-Hesmond, Montreuil |
| Boisjean, Montreuil |
| Blingel, Montreuil |
| Blangy-sur-Ternoise, Montreuil |
| Bimont, Montreuil |
| Bezinghem, Montreuil |
| Beutin, Montreuil |
| Beussent, Montreuil |
| Bernieulles, Montreuil |
| Berck, Montreuil |
| Beaurainville, Montreuil |
| Beaumerie-Saint-Martin, Montreuil |
| Azincourt, Montreuil |
| Avondance, Montreuil |
| Avesnes, Montreuil |
| Auchy-lès-Hesdin, Montreuil |
| Aubin-Saint-Vaast, Montreuil |
| Attin, Montreuil |
| Ambricourt, Montreuil |
| Alette, Montreuil |
| Aix-en-Issart, Montreuil |
| Aix-en-Ergny, Montreuil |
| Airon-Saint-Vaast, Montreuil |
| Airon-Notre-Dame, Montreuil |