Kahra is Taluka (Tehsil) in Saharsa district of Bihar state. Kahra has 10 areas (postal offices).
| Pin code | Area | District | Taluka | Postal Status |
|---|---|---|---|---|
| 852202 | B S Patti PIN Code | Saharsa | Kahra | Branch Office |
| 852212 | Bangaon Saharsa PIN Code | Saharsa | Kahra | Sub Office |
| 852202 | Bharouli Dhakjhari PIN Code | Saharsa | Kahra | Branch Office |
| 852202 | Diwari PIN Code | Saharsa | Kahra | Branch Office |
| 852202 | Garhia PIN Code | Saharsa | Kahra | Branch Office |
| 852202 | Murli Basantpur PIN Code | Saharsa | Kahra | Branch Office |
| 852202 | Nariyarh PIN Code | Saharsa | Kahra | Branch Office |
| 852212 | Parri PIN Code | Saharsa | Kahra | Branch Office |
| 852201 | Saharsa Bazar PIN Code | Saharsa | Kahra | Sub Office |
| 852202 | Saharsa Collec PIN Code | Saharsa | Kahra | Sub Office |