53721 is the Postal Code/PLZ Code for Siegburg in the Germany State of North Rhine-Westphalia and the District of Landkreis Rhein-Sieg-Kreis. The town of Siegburg is located in Postal Code 53721.
| Postal Code | 53721 |
| Postal Code Name | Siegburg |
| State | North Rhine-Westphalia |
| District | Landkreis Rhein-Sieg-Kreis |
| Timezone | Central European Summer Time (CEST) |
| Adjacent Postal Codes | 53757 53773 53797 53819 53840 |