Udu is a Local Government Area (LGA) in Delta State, Nigeria. The postal codes in Udu are primarily 331103.
Here are the postal codes of the streets and districts in Udu:
| Location | Postcode |
| Udu | 330103 |
| Ugbisi | 330103 |
| Ujevwu | 330103 |
| Ukperheren | 330103 |
| Ukpiovwini | 330103 |
| Uvwian | 330103 |
| Ahadja | 330103 |
| Opete | 330103 |
| Asagba | 330103 |
| Orhuwhorum | 330103 |
| Ayama | 330103 |
| Ovwodokpokpo | 330103 |
| Edjophe | 330103 |
| Owhrode | 330103 |
| Egiegi | 330103 |
| Tareri | 330103 |
| Egini | 330103 |
| Ubogo | 330103 |
| Ekete | 330103 |
| Ekorota | 330103 |
| Emadadja | 330103 |
| Erhieuiohor | 330103 |
| Obodo | 330103 |
| Obubu | 330103 |
| Ogbe-Udu | 330103 |
| Oghior | 330103 |
| Okolo | 330103 |
| Olari | 330103 |