Colgong is Taluka (Tehsil) in Bhagalpur district of Bihar state. Colgong has 9 areas (postal offices).
| Pin code | Area | District | Taluka | Postal Status |
|---|---|---|---|---|
| 813222 | Budhuchal PIN Code | Bhagalpur | Colgong | Branch Office |
| 813222 | Ekchari Khawas PIN Code | Bhagalpur | Colgong | Branch Office |
| 812006 | Kishandaspur PIN Code | Bhagalpur | Colgong | Branch Office |
| 813222 | Lagma PIN Code | Bhagalpur | Colgong | Branch Office |
| 813209 | Moultola PIN Code | Bhagalpur | Colgong | Branch Office |
| 813222 | Nandlalpur PIN Code | Bhagalpur | Colgong | Branch Office |
| 813222 | Ranidiara PIN Code | Bhagalpur | Colgong | Branch Office |
| 813214 | S T P Kahalgaon PIN Code | Bhagalpur | Colgong | Sub Office |
| 813204 | Trimohan PIN Code | Bhagalpur | Colgong | Branch Office |