Districts in Bihar
| District | PIN codes | Post offices |
|---|---|---|
| Araria | 16 | 161 |
| Arwal | 14 | 96 |
| Aurangabad | 27 | 304 |
| Banka | 17 | 242 |
| Begusarai | 32 | 236 |
| Bhagalpur | 23 | 248 |
| Bhojpur | 39 | 305 |
| Buxar | 26 | 187 |
| Darbhanga | 42 | 368 |
| Gaya | 32 | 404 |
| Gopalganj | 21 | 209 |
| Jamui | 11 | 200 |
| Jehanabad | 17 | 125 |
| Kaimur (Bhabua) | 9 | 164 |
| Katihar | 23 | 185 |
| Khagaria | 15 | 144 |
| Kishanganj | 8 | 95 |
| Lakhisarai | 8 | 93 |
| Madhepura | 18 | 202 |
| Madhubani | 43 | 428 |
| Munger | 11 | 118 |
| Muzaffarpur | 47 | 423 |
| Nalanda | 25 | 281 |
| Nawada | 26 | 238 |
| Pashchim Champaran | 19 | 278 |
| Patna | 73 | 497 |
| Purbi Champaran | 41 | 426 |
| Purnia | 23 | 191 |
| Rohtas | 34 | 300 |
| Saharsa | 13 | 167 |
| Samastipur | 39 | 380 |
| Saran | 48 | 390 |
| Sheikhpura | 6 | 98 |
| Sheohar | 5 | 46 |
| Sitamarhi | 28 | 300 |
| Siwan | 40 | 329 |
| Supaul | 22 | 211 |
| Vaishali | 31 | 299 |
Head post offices in Bihar
Bihar has 33 head post offices. Each keeps the accounts for the sub and branch offices of its postal division.
- Arrah802301
- Aurangabad BH824101
- Banka813102
- Bankipore800004
- Begusarai851101
- Bettiah845438
- Bhagalpur812001
- Biharsharif803101
- Buxar802101
- Chapra841301
- Darbhanga846004
- Gaya823001
- Gopalganj841428
- Hajipur844101
- Jamui811307
- Jehanabad804408
- Katihar854105
- Laheriasarai846001
- Lohia Nagar800020
- Madhubani847211
- Marhowrah841418
- Motihari845401
- Munger811201
- Muzaffarpur842001
- Nawadha805110
- Patna GPO800001
- Purnea854301
- Saharsa852201
- Samastipur848101
- Sasaram821115
- Sitamarhi843301
- Siwan841226
- Supaul852131
How Bihar PIN codes are numbered
- 84: 379 PINs (43% of the state's)
- 80: 220 PINs (25% of the state's)
- 85: 145 PINs (16% of the state's)
- 82: 79 PINs (8.9% of the state's)
- 81: 64 PINs (7.2% of the state's)
The first digit, 8, places Bihar in India Post's Eastern region. The third digit narrows it to a sorting district, and the last three digits to the post office that delivers the mail.
Bihar's post offices at a glance
- Head offices: 33; sub offices: 1,055; branch offices: 8,280 (88% of the total)
- Deliver mail: 9,133 offices (97%); the rest are counter-only
- Postal divisions: 26
- Most post offices: Patna district, with 497
Frequently asked questions
How many PIN codes are there in Bihar?
887 PIN codes, covering 9,368 post offices in 38 districts.
Which district in Bihar has the most PIN codes?
Patna, with 73 PIN codes and 497 post offices.
What do Bihar PIN codes start with?
With the digits 80, 81, 82, 84 and 85. The first digit, 8, is India Post's Eastern region; the first two digits identify the postal circle.
Sources
Last checked on 6 October 2026. PIN codes and post offices are from India Post’s directory on data.gov.in. Post offices are sometimes opened, merged or renamed; check with India Post before relying on a PIN for an official form.