Sonbarsa is Taluka (Tehsil) in Saharsa district of Bihar state. Sonbarsa has 10 areas (postal offices).
| Pin code | Area | District | Taluka | Postal Status |
|---|---|---|---|---|
| 852217 | Balia PIN Code | Saharsa | Sonbarsa | Branch Office |
| 852217 | Biratpur PIN Code | Saharsa | Sonbarsa | Branch Office |
| 852129 | Kenjari PIN Code | Saharsa | Sonbarsa | Branch Office |
| 852129 | Maina PIN Code | Saharsa | Sonbarsa | Branch Office |
| 852129 | Mali PIN Code | Saharsa | Sonbarsa | Branch Office |
| 852217 | Mangwar PIN Code | Saharsa | Sonbarsa | Sub Office |
| 852217 | Noneti PIN Code | Saharsa | Sonbarsa | Branch Office |
| 852129 | Pararia PIN Code | Saharsa | Sonbarsa | Branch Office |
| 852129 | Shahpur PIN Code | Saharsa | Sonbarsa | Branch Office |
| 852129 | Sonbersa Raj PIN Code | Saharsa | Sonbarsa | Sub Office |