PIN codes of Bihar by district
| District | PIN codes | Post offices | Head post office |
|---|---|---|---|
| Araria | 17 (854102 to 854336) | 171 | – |
| Arwal | 11 (804401 to 824235) | 82 | – |
| Aurangabad | 26 (824101 to 824304) | 277 | Aurangabad BH 824101 |
| Banka | 19 (811308 to 814131) | 221 | Banka 813102 |
| Begusarai | 31 (811106 to 851218) | 239 | Begusarai 851101 |
| Bhagalpur | 26 (811211 to 853205) | 254 | Bhagalpur 812001 |
| Bhojpur | 38 (802112 to 841312) | 303 | Arrah 802301 |
| Buxar | 26 (802101 to 802136) | 186 | Buxar 802101 |
| Darbhanga | 41 (846001 to 848213) | 368 | Laheriasarai 846001, Darbhanga 846004 |
| Gaya | 33 (803116 to 824237) | 379 | Gaya 823001 |
| Gopalganj | 21 (841405 to 841508) | 208 | Gopalganj 841428 |
| Jamui | 11 (811301 to 811317) | 165 | Jamui 811307 |
| Jehanabad | 21 (801303 to 824233) | 126 | Jehanabad 804408 |
| Kaimur (bhabua) | 9 (802132 to 821110) | 133 | – |
| Katihar | 22 (813209 to 855114) | 185 | Katihar 854105 |
| Khagaria | 15 (848201 to 852161) | 154 | – |
| Kishanganj | 8 (854333 to 855117) | 91 | – |
| Lakhisarai | 8 (811106 to 811315) | 91 | – |
| Madhepura | 18 (852101 to 853204) | 202 | – |
| Madhubani | 42 (847102 to 847424) | 427 | Madhubani 847211 |
| Munger | 10 (811201 to 813221) | 115 | Munger 811201 |
| Muzaffarpur | 46 (842001 to 848125) | 419 | Muzaffarpur 842001 |
| Nalanda | 29 (801301 to 811104) | 327 | Biharsharif 803101 |
| Nawada | 24 (801302 to 805132) | 189 | Nawadha 805110 |
| Pashchim Champaran | 17 (845101 to 845459) | 274 | Bettiah 845438 |
| Patna | 68 (800001 to 811104) | 438 | Patna 800001, Bankipore 800004, LOHIA NAGAR 800020 |
| Purbi Champaran | 38 (845301 to 845458) | 424 | Motihari 845401 |
| Purnia | 23 (852101 to 854337) | 178 | Purnea 854301 |
| Rohtas | 32 (802204 to 821312) | 270 | Sasaram 821115 |
| Saharsa | 13 (852106 to 852221) | 166 | Saharsa 852201 |
| Samastipur | 37 (844506 to 848506) | 378 | Samastipur 848101 |
| Saran | 48 (841101 to 841460) | 389 | Chapra 841301, Marhowrah 841418 |
| Sheikhpura | 7 (811101 to 811315) | 100 | – |
| Sheohar | 5 (843128 to 843335) | 46 | – |
| Sitamarhi | 27 (843104 to 847307) | 301 | Sitamarhi 843301 |
| Siwan | 39 (841203 to 841509) | 329 | Siwan 841226 |
| Supaul | 22 (813102 to 854340) | 211 | Supaul 852131 |
| Vaishali | 31 (843104 to 844509) | 297 | Hajipur 844101 |
Head post offices in Bihar
Head post offices sort and dispatch the mail of the sub and branch offices around them. Their PIN codes are often the ones people mean by “the PIN code of” a city: Aurangabad BH 824101, Banka 813102, Begusarai 851101, Bhagalpur 812001, Arrah 802301, Buxar 802101, Laheriasarai 846001, Darbhanga 846004, Gaya 823001, Gopalganj 841428, Jamui 811307, Jehanabad 804408, Katihar 854105, Madhubani 847211, Munger 811201, Muzaffarpur 842001, Biharsharif 803101, Nawadha 805110, Bettiah 845438, Patna 800001, Bankipore 800004, LOHIA NAGAR 800020, Motihari 845401, Purnea 854301, Sasaram 821115, Saharsa 852201, Samastipur 848101, Chapra 841301, Marhowrah 841418, Sitamarhi 843301 and more in the district pages.