| Office Name | Gamhariya B.O |
| Pincodes | 843315 |
| Area | Gamhariya |
| Office Status | Branch Post Office |
| Postal Circle | Bihar |
| Postal Division | Sitamarhi |
| Postal Region | Muzaffarpur |
| District | Sitamarhi |
| State | Bihar |
| Telephone No. | Na |
| Office Name | Gamhariya B.O |
| Pincodes | 821301 |
| Area | Gamhariya |
| Office Status | Branch Post Office |
| Postal Circle | Bihar |
| Postal Division | Rohtas |
| Postal Region | Patna Hq |
| District | Rohtas |
| State | Bihar |
| Telephone No. | Na |
| Office Name | Gamhariya B.O |
| Pincodes | 828134 |
| Area | Gamhariya |
| Office Status | Branch Post Office |
| Postal Circle | Jharkhand |
| Postal Division | Dhanbad |
| Postal Region | Ranchi |
| District | Bokaro |
| State | Jharkhand |
| Telephone No. | Na |