Digboi is a town with a Municipal Board in Tinsukia district, Upper Assam. Known worldwide as the site of Asia's first oil well drilled in 1889, it remains rich in oil and gas reserves and tea estates, lying close to rainforest areas in the south. Its colonial-era bungalows remain a reminder of the past when the British lived here in large numbers due to the oil discovery, giving the town a distinct historical charm. The constituency covers the entire Digboi municipal area, including Digboi Oil Town, as well as parts of Hapjan, Kakopather, and Margherita development blocks. It is a general unreserved Assembly seat, one of the 10 segments of the Dibrugarh Lok Sabha constituency. A truly Congress bastion for decades, it has come under challenge from the BJP, of late.
Established in 1951, Digboi has participated in all 15 Assembly elections held so far in Assam. Rameshwar Dhanowar, who went on to serve as a cabinet minister in the Hiteswar Saikia and Tarun Gogoi governments, won eight consecutive terms for Congress and remained undefeated in his 38-year career as a lawmaker. He contested and won his last election in 2011, defeating Suresh Phukan, who had switched over to BJP from AGP, by 10,758 votes. He had beaten Phukan in 2006 by 12,735 votes. Dhanowar opted not to seek re-election in 2016 due to health reasons. Congress fielded his son Gautam Dhanowar in his place. Phukan grabbed this opportunity and finally won his first election after two consecutive defeats, defeating Gautam Dhanowar by 14,343 votes. Phukan retained the seat for the BJP in 2021 by prevailing over Congress’s Shibanath Chetia by 26,976 votes.
The BJP started digging its heels in Digboi, as deep as its oil wells, from 2014 onwards. Congress led AGP by 11,550 votes in 2009 in the Digboi Assembly segment, and has since been returning with the consolation prize of runners-up, having trailed the BJP in three consecutive parliamentary polls. BJP led Congress by 17,748 votes in 2014, 42,144 votes in 2019 and 31,178 votes in 2024.
Digboi had 147,098 eligible voters in the final roll for the 2026 Assembly elections, up from 142,611 in 2024. Earlier, it stood at 137,617 in 2021, 129,837 in 2019, 114,936 in 2016 and 112,637 in 2011. No social group is big enough in Digboi to dominate the electoral space. Muslims form 6.60 per cent of the voters, while Scheduled Castes and Scheduled Tribes account for 2.59 per cent and 2.25 per cent of its electorate, respectively. Digboi is predominantly a rural seat with fair representation of urban voters on its roll. It had 73.07 per cent rural and 26.93 per cent urban voters, based on the 2011 Census reports. Enthusiasm of Digboi voters is reflected in its remarkably high and steady turnout with minor fluctuations. It recorded a turnout of 79.84 per cent in 2011, followed by 82.60 per cent in 2016, 77.03 per cent in 2019, 80.73 per cent in 2021 and 78.92 per cent in 2024.
The Digboi constituency covers parts of Tinsukia district with the Burhi Dihing River flowing nearby. The land is flat alluvial plains in the north and slopes up toward the Patkai hills and rainforests in the south. The area mixes fertile lowlands for tea and agriculture with hilly edges. Besides the Burhi Dihing, some smaller streams also help with irrigation and local needs.
The economy rests on oil and gas extraction, tea estates, paddy farming and small trade. Oil India Limited's operations drive major employment and revenue. The town acquired its name from the English phrase “Dig, boy!†exclaimed by a colonial engineer, urging labourers to dig when oil was discovered seeping from the ground. Tea processing and agriculture support rural families. Fertile soils and abundant rainfall sustain these activities. Infrastructure includes good road connectivity via National Highway 15 and state roads linking to Tinsukia and Dibrugarh. Rail access is available at Digboi railway station on the Northeast Frontier Railway network. Basic amenities serve the town and surrounding villages, with ongoing developments in oil-related industries, the tea sector and rural roads.
The district headquarters, Tinsukia, is about 35-40 km west. Other nearby towns in Assam include Margherita, about 20 km east, Duliajan, about 25 km west, and Doomdooma northward. State capital, Dispur/Guwahati, is around 500-520 km southwest. Arunachal Pradesh lies farther east.
If Congress has with it its rich history in Digboi, the BJP has with it the present, and probably the immediate future also. In the last seven elections held here, the BJP has been ahead of Congress in five. No contest is inappropriate to describe the 2026 Assembly elections in the Digboi constituency. However, the onus would be on Congress to prove the pollsters wrong by converting a looming defeat into a remarkable victory.
(Ajay Jha)
