Sonbarsa is Taluka (Tehsil) in Sitamarhi district of Bihar state. Sonbarsa has 16 areas (postal offices).
| Pin code | Area | District | Taluka | Postal Status |
|---|---|---|---|---|
| 843317 | B Jay Nagar PIN Code | Sitamarhi | Sonbarsa | Branch Office |
| 843317 | Banarjhula PIN Code | Sitamarhi | Sonbarsa | Branch Office |
| 843322 | Dighi PIN Code | Sitamarhi | Sonbarsa | Branch Office |
| 843317 | Fulkaha PIN Code | Sitamarhi | Sonbarsa | Branch Office |
| 843317 | Hanuman Nagar PIN Code | Sitamarhi | Sonbarsa | Branch Office |
| 843317 | Haribela PIN Code | Sitamarhi | Sonbarsa | Branch Office |
| 843322 | Jogiwana PIN Code | Sitamarhi | Sonbarsa | Branch Office |
| 843317 | K Bhandar PIN Code | Sitamarhi | Sonbarsa | Branch Office |
| 843322 | Kamaldah PIN Code | Sitamarhi | Sonbarsa | Branch Office |
| 843322 | Lattipur PIN Code | Sitamarhi | Sonbarsa | Branch Office |
| 843317 | M Kala PIN Code | Sitamarhi | Sonbarsa | Branch Office |
| 843322 | Madhopur PIN Code | Sitamarhi | Sonbarsa | Branch Office |
| 843317 | P Dadan PIN Code | Sitamarhi | Sonbarsa | Branch Office |
| 843322 | Panthpakar PIN Code | Sitamarhi | Sonbarsa | Branch Office |
| 843317 | Singrahiya PIN Code | Sitamarhi | Sonbarsa | Branch Office |
| 843317 | Singwahini PIN Code | Sitamarhi | Sonbarsa | Branch Office |