| Place | Postal Code |
|---|---|
| Postal/ZIP Codes in Boucherville, Longueuil | J4B |
| Postal/ZIP Codes in Brossard, Longueuil | J4W, J4X, J4Y, J4Z |
| Postal/ZIP Codes in Greenfield Park, Longueuil | J4R, J4V |
| Postal/ZIP Codes in Lemoyne, Longueuil | J4P, J4R |
| Postal/ZIP Codes in Longueuil, Longueuil | J4G, J4H, J4J, J4K, J4L, J4M, J4N, J4P |
| Postal/ZIP Codes in Saint-Bruno, Longueuil | J3V |
| Postal/ZIP Codes in Saint-Hubert, Longueuil | J3Y, J3Z, J4T |
| Postal/ZIP Codes in Saint-Lambert, Longueuil | J4P, J4R, J4S |
| Postal/ZIP Codes in Saint-Mathieu-de-Laprairie, Longueuil | J0L 2H0 |