Locality lists, postal codes, area codes
| City | Postal code | Area code |
| Udvar | 7718 | 69 |
| Udvari | 7066 | 74 |
| Ugod | 8564 | 89 |
| Ukk | 8347 | 87 |
| Und | 9464 | 99 |
| Uppony | 3622 | 48 |
| Ura | 4763 | 74 |
| Uraiújfalu | 9651 | 95 |
| Uraj | 3621 | 48 |
| Uszka | 4952 | 44 |
| Uszód | 6332 | 78 |
| Uzsa | 8321 | 88 |
| Uzsabánya | 8321 | 87 |
