There are 10 post offices under PIN code 855115.
| Post Office | Office Type | Delivery Status | Taluk | District | Division | Region | State | Circle | |
|---|---|---|---|---|---|---|---|---|---|
| 1 | Angarhat B.O | Branch Office | Delivery | Kishanganj | Kishanganj | Purnea | Muzaffarpur | Bihar | Bihar |
| 2 | Dhanpatganj B.O | Branch Office | Delivery | Kishanganj | Kishanganj | Purnea | Muzaffarpur | Bihar | Bihar |
| 3 | Dogharia B.O | Branch Office | Delivery | Kishangaj | Kishanganj | Purnea | Muzaffarpur | Bihar | Bihar |
| 4 | Haldikhora B.O | Branch Office | Delivery | Kishanganj | Kishanganj | Purnea | Muzaffarpur | Bihar | Bihar |
| 5 | Kochadhaman B.O | Branch Office | Delivery | Kishanganj | Kishanganj | Purnea | Muzaffarpur | Bihar | Bihar |
| 6 | Mirpur B.O | Branch Office | Delivery | Kishanganj | Kishanganj | Purnea | Muzaffarpur | Bihar | Bihar |
| 7 | Modho B.O | Branch Office | Delivery | Kishanganj | Kishanganj | Purnea | Muzaffarpur | Bihar | Bihar |
| 8 | Shishabari B.O | Branch Office | Delivery | Kishanaganj | Kishanganj | Purnea | Muzaffarpur | Bihar | Bihar |
| 9 | Singhari B.O | Branch Office | Delivery | Kishanganj | Kishanganj | Purnea | Muzaffarpur | Bihar | Bihar |
| 10 | Sontha S.O | Sub Office | Delivery | Kishanganj | Kishanganj | Purnea | Muzaffarpur | Bihar | Bihar |