26121 is the Postal Code/PLZ Code for Oldenburg (Oldenburg) in the Germany State of Lower Saxony and the District of Oldenburg (Oldenburg).
| Postal Code | 26121 |
| Postal Code Name | Oldenburg (Oldenburg) |
| State | Lower Saxony |
| District | Oldenburg (Oldenburg) |
| Timezone | Central European Summer Time (CEST) |
| Adjacent Postal Codes | 26122 26123 26125 26127 26129 |