| Country | France (FR) |
| UN/LOCODE | BYY |
| Name | Boissy-sous-Saint-Yon |
| Name Without Diacritics | Boissy-sous-Saint-Yon |
| Region | 91 |
| Function Code | --3----- |
| Function | Road |
| Status Code | RL (Recognised Location) |
| Date | 1101 |
| Timezone | Europe/Paris |
| Location (UN Format) | 4833N 00212E |
| Latitude Longitude | 48.5538, 2.2121 |