| Country | Portugal (PT) |
| UN/LOCODE | OEI |
| Name | Oeiras |
| Name Without Diacritics | Oeiras |
| Region | 11 |
| Function Code | 123----- |
| Function | Port, Rail, Road |
| Status Code | RL (Recognised Location) |
| Date | 401 |
| Timezone | Europe/Lisbon |
| Location (UN Format) | 3841N 00919W |
| Latitude Longitude | 38.691, -9.3109 |