| Locality | Post Code |
|---|---|
| Oyouma, Mpassa | |
| Sangoue, Mpassa | |
| Sibbi, Mpassa | |
| Sibi, Mpassa | |
| Tsanga, Mpassa | |
| Yene, Mpassa | |
| Yeye, Mpassa | |
| Youlou, Mpassa |
| Haut-Ogooué Postal Codes | |
|---|---|
| Sébé-Brikolo | Plateaux |
| Ogooué-Létili | Mpassa |
| Lékoni-Lékori | Lékoko |
| Lékabi-Léwolo | Lébombi-Léyou |
| Djoué | Djouori-Agnili |
| Bayi-Brikolo | |