57641 is the Postal Code/PLZ Code for Oberlahr in the Germany State of Rhineland-Palatinate and the District of Landkreis Altenkirchen (Westerwald).
| Postal Code | 57641 |
| Postal Code Name | Oberlahr |
| State | Rhineland-Palatinate |
| District | Landkreis Altenkirchen (Westerwald) |
| Timezone | Central European Summer Time (CEST) |
| Adjacent Postal Codes | 56593 57632 |