| Postal Code Place Name | Cergy |
| Region | Île-de-France |
| Department | Val-d'Oise |
| Arrondissement | Pontoise |
| Canton | Vauréal |
| Current Time: | CET |
| Time Zone: | Central European Time |
| IANA Time Zone: | Europe/Paris |
| Dialing Code: | 01 |
| 95000 Cergy |
| 95180 Menucourt |
| 95450 Vigny |
| 95490 Vauréal |
| 95520 Osny |
| 95650 Boissy-l'Aillerie |