The Pin Code of Harnathpur is 841504. Get more details along with the Pin Code of Harnathpur. Harnathpur is located in Siwan district in Bihar. 841504 is the pincode (Postal code) of Harnathpur.
| Location | Pincode | State | District |
| Harnathpur | 841504 | Bihar | Siwan |
| Location | Pincode | State | District |
| Admapur | 841504 | Bihar | Siwan |
| Karsar | 841504 | Bihar | Siwan |
| Narhan | 841504 | Bihar | Siwan |
| Raghunathpur | 841504 | Bihar | Siwan |
| Rajpur | 841504 | Bihar | Siwan |
| Ramnagar | 841504 | Bihar | Siwan |