PIN codes of Assam by district
| District | PIN codes | Post offices | Head post office |
|---|---|---|---|
| Baksa | 18 (781320 to 781377) | 129 | – |
| Barpeta | 23 (781301 to 783101) | 187 | Barpeta 781301 |
| Biswanath | 16 (784166 to 784189) | 93 | – |
| Bongaigaon | 10 (783371 to 783392) | 69 | – |
| Cachar | 51 (782448 to 788817) | 283 | Silchar 788001 |
| Charaideo | 12 (785640 to 785698) | 73 | – |
| Chirang | 8 (783372 to 783394) | 65 | – |
| Darrang | 13 (784114 to 784529) | 73 | Mangaldoi 784125 |
| Dhemaji | 10 (787026 to 787110) | 94 | – |
| Dhubri | 15 (783123 to 783371) | 127 | Dhubri 783301 |
| Dibrugarh | 29 (785675 to 786692) | 218 | Dibrugarh 786001 |
| Dima Hasao | 9 (788107 to 788931) | 74 | – |
| Goalpara | 12 (783101 to 783134) | 103 | – |
| Golaghat | 20 (785601 to 785705) | 145 | Golaghat 785621 |
| Hailakandi | 14 (788150 to 788802) | 98 | Hailakandi 788151 |
| Hojai | 10 (782428 to 782481) | 76 | – |
| Jorhat | 29 (785001 to 785704) | 187 | Jorhat 785001 |
| Kamrup | 30 (781030 to 781382) | 201 | – |
| Kamrup Metro | 43 (781001 to 782411) | 78 | Guwahati 781001, Guwahati University 781014 |
| Karbi Anglong | 12 (782136 to 782490) | 95 | Diphu 782460 |
| Karimganj | 26 (788152 to 788806) | 161 | Karimganj 788710 |
| Kokrajhar | 16 (783331 to 783376) | 104 | Kokrajhar 783370 |
| Lakhimpur | 17 (784160 to 787058) | 167 | North Lakhimpur 787001 |
| Majuli | 7 (785102 to 787052) | 57 | – |
| Marigaon | 11 (782103 to 782413) | 96 | – |
| Nagaon | 28 (782001 to 782450) | 212 | Nagaon 782001 |
| Nalbari | 26 (781126 to 781378) | 149 | Nalbari 781335 |
| Sivasagar | 23 (785640 to 785701) | 173 | Sivasagar 785640 |
| Sonitpur | 27 (784001 to 784507) | 126 | Tezpur 784001 |
| South Salmara Mancachar | 4 (783127 to 783135) | 27 | – |
| Tinsukia | 31 (786125 to 786601) | 142 | Tinsukia 786125 |
| Udalguri | 17 (784113 to 784528) | 99 | – |
| West Karbi Anglong | 6 (782413 to 782486) | 30 | – |
Head post offices in Assam
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: Barpeta 781301, Silchar 788001, Mangaldoi 784125, Dhubri 783301, Dibrugarh 786001, Golaghat 785621, Hailakandi 788151, Jorhat 785001, Guwahati 781001, Guwahati University 781014, Diphu 782460, Karimganj 788710, Kokrajhar 783370, North Lakhimpur 787001, Nagaon 782001, Nalbari 781335, Sivasagar 785640, Tezpur 784001, Tinsukia 786125.