| Postal Code | Place Name | Region | Department | Arrondissement | Canton |
|---|---|---|---|---|---|
| 62219 | Longuenesse | Hauts-de-France | Pas-de-Calais | Saint-Omer | Longuenesse |
| 62510 | Arques | Hauts-de-France | Pas-de-Calais | Saint-Omer | Longuenesse |
| 62570 | Wizernes | Hauts-de-France | Pas-de-Calais | Saint-Omer | Longuenesse |
| 62575 | Blendecques | Hauts-de-France | Pas-de-Calais | Saint-Omer | Longuenesse |