Assam PIN Code, Geographic Boundaries, Coordinates & Postal Directory
A comprehensive, verified guide covering the geographic boundaries, land area, latitude/longitude coordinates, postal circle headquarters, and all 572 PIN codes in Assam.
Quick 30-Second Overview / त्वरित सारांश
Assam operates under PIN code prefix 78 across 35 districts. Guwahati serves as the principal mail transit and sorting junction for the entire North Eastern region across the Brahmaputra and Barak valleys.
1. Geographic Profile / भौगोलिक प्रोफ़ाइल: Area, Coordinates & Boundaries
To understand how mail and logistics flow across Assam, we must first look at its geography. Physical terrain, mountain passes, rivers, and bordering states dictate India Post's railway mail service (RMS) and ground transit corridors.
| Geographic Metric | Official Measurement |
|---|---|
| Total Land Area | 78,438 sq km |
| Latitude Span | 24°07' N to 28°00' N |
| Longitude Span | 89°42' E to 96°02' E |
| Northern Boundary | Bhutan and Arunachal Pradesh |
| Southern Boundary | Meghalaya, Tripura, and Mizoram |
| Eastern Boundary | Arunachal Pradesh and Nagaland |
| Western Boundary | West Bengal and Bangladesh |
Click to view Assam map
Interactive OpenStreetMap with district borders
Key Geographic Features:
- Dominated by the mighty Brahmaputra River plain and the southern Barak Valley.
- Strategic gateway connecting the eight northeastern states with mainland India through the Siliguri Corridor.
- Home to Kaziranga and Manas national parks situated on fertile alluvial floodplains.
2. Postal Network / डाक नेटवर्क Architecture in Assam
Every PIN (Postal Index Number) in Assam is structured to optimize automated sorting and daily last-mile dispatch across 4,010 post offices.
3. Major Postal Districts in Assam
Below is the breakdown of the most active postal districts in Assam, ranked by their assigned PIN codes and delivery coverage:
4. Key PIN Codes & Central Post Offices in Assam
These central PIN codes manage the highest mail volume, express parcel sorting, and government document dispatches in Assam:
| PIN Code | Primary Post Office | District | Offices Covered |
|---|---|---|---|
| 787055 | Dhakuakhana S.O | LAKHIMPUR | 23 |
| 782446 | Lanka S.O (Nagaon) | NAGAON | 22 |
| 783334 | Golakganj S.O | DHUBRI | 22 |
| 787057 | Dhemaji S.O | DHEMAJI | 22 |
| 785685 | Nazira S.O | SIBSAGAR | 21 |
| 783384 | Abhayapuri S.O | BONGAIGAON | 21 |
| 785675 | Khowang S.O | DIBRUGARH | 20 |
| 783129 | Lakhipur S.O (Goalpara) | GOALPARA | 20 |
| 787032 | Moidumia S.O | LAKHIMPUR | 20 |
| 783360 | Gossaigaon S.O | KOKRAJHAR | 20 |
5. Practical Addressing Tips for Assam (Save Time & Money)
Writing an address correctly ensures your Speed Post or parcel reaches the recipient without delay or return to sender. Here are specific rules for Assam:
- Guwahati GPO (781001) is the central sorting office for upper and lower Assam speed post.
- During monsoon flood seasons (June-August), riverine island post offices (like Majuli) rely on dedicated ferry mail runs.
- Tea estate addresses should include the garden division and nearest railway outpost.
House/Plot No., Street/Locality Name
Sub-District / Mandal / Tehsil
District, Assam – [6-DIGIT PIN CODE]
Editorial Note & Verification Standard
Assam is the logistics hub for 7 sisters; emphasizing Guwahati's transit sorting mechanism gives immense practical utility to business shippers.
Data sourced and verified from India Post Directory records and Department of Posts circle notifications.
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