Sivasagar, also spelt Sibsagar, is a town and the headquarters of the Sivasagar district in the Indian state of Assam. Located in Upper Assam, it served as the capital of the Ahom kingdom for several centuries and retains a rich legacy of monuments, tanks, and temples from that period. The town takes its name from the Sivasagar Tank (Borpukhuri), a large artificial lake commissioned in the 18th century, on whose banks stand the Shivadol, Vishnudol, and Devidol temples.
| Name | Sivasagar (Sibsagar) |
|---|---|
| Country | India |
| State | Assam |
| District | Sivasagar |
| Region | Upper Assam |
| Historical role | Capital of the Ahom kingdom |
| Languages | Assamese |
| Notable landmark | Sivasagar Tank with Shivadol, Vishnudol and Devidol |
Sivasagar lies on the south bank of the Brahmaputra valley, in the upper reaches of Assam. The surrounding district is part of the alluvial plain of the Brahmaputra and its tributaries, with the Dikhow river flowing close to the town. The terrain is largely flat, fertile, and supports paddy cultivation as well as extensive tea gardens. The climate is humid subtropical, with heavy monsoon rains between June and September.
Sivasagar's significance is closely tied to the Ahom Dynasty, which ruled much of Assam from 1228 to 1826. The Ahoms shifted their capital several times, with Rangpur (modern Sivasagar) and the nearby sites of Garhgaon and Joysagar serving as principal seats of power during the 17th and 18th centuries. Many of the town's surviving monuments date from the reigns of Rudra Singha, Siba Singha, Pramatta Singha, Rajeswar Singha, and Lakshmi Singha.
The town's namesake tank, the Sivasagar Tank or Borpukhuri, was excavated during the reign of Siba Singha in the early 18th century. On its banks, the Shivadol, dedicated to Shiva, is among the tallest Hindu temples in Assam; the Vishnudol and Devidol stand alongside it.
Following the Burmese invasions of Assam in the early 19th century and the subsequent Treaty of Yandabo in 1826, the region passed to the British East India Company, and Sivasagar became an administrative centre under colonial rule. The discovery of crude oil at nearby Digboi and the establishment of tea plantations in the 19th century shaped the modern economy of the area.
The economy of Sivasagar is anchored by tea cultivation, petroleum and natural gas, and agriculture. The district lies within one of Assam's principal oil-producing belts, and operations of Oil India Limited and the Oil and Natural Gas Corporation are active in the region. Numerous tea estates surround the town, and rice remains the dominant food crop. Tourism centred on Ahom-era heritage sites contributes to the local economy.
Sivasagar functions as the administrative headquarters of Sivasagar district. The town is governed by a municipal board, while the district is administered by a Deputy Commissioner. It is part of the Jorhat Lok Sabha constituency for the Indian Parliament and elects representatives to the Assam Legislative Assembly.
Sivasagar is connected by National Highway 37 (renumbered as part of NH 715) running through Upper Assam. The nearest railway station is at Simaluguri Junction, on the Northeast Frontier Railway, and the closest airports are at Jorhat (Rowriah) and Dibrugarh (Mohanbari).
Assamese is the principal language of the town. Major festivals include the three Bihus — Rongali (Bohag), Kongali (Kati), and Bhogali (Magh) — alongside Hindu festivals such as Durga Puja and Shivaratri, the last observed with particular grandeur at the Shivadol. The town is also a centre for Sattriya cultural traditions associated with the wider Vaishnavite movement of Assam.