Sissiborgaon Assembly constituency is one of the 126 constituencies in the Assam Legislative Assembly, created as a new seat in the 2023 delimitation exercise. It is located in the Dhemaji-Lakhimpur belt of north Assam and falls under the Lakhimpur Lok Sabha segment. The constituency covers a rural, flood-vulnerable terrain in the Brahmaputra-Subansiri basin, predominantly reliant on agriculture.
The main political parties in Assam include the Bharatiya Janata Party (BJP), Congress, Asom Gana Parishad (AGP), All India United Democratic Front (AIUDF), Bodoland People's Front (BPF), United People's Party Liberal (UPPL), and the Communist Party of India (Marxist) (CPM).
As a newly created constituency, Sissiborgaon does not carry a direct 2021 result. Adjacent Jonai (ST) in 2021 was won by BJP's Bhubon Pegu with 1,68,411 votes by a massive 1,10,987-vote margin, and Dhakuakhana (ST) by BJP's Naba Kumar Doley by 9,596 votes. In 2026, BJP's Jiban Gogoi contests against Dulal Chandra Boruah (Rajjor Dal) for the new Sissiborgaon seat.
The 2026 Assam Assembly elections will test Chief Minister Himanta Biswa Sarma's BJP-led government, which swept to power with a comfortable majority in 2021. With the opposition Congress-AIUDF combine seeking to consolidate anti-incumbency sentiment, every constituency will be a crucial battleground in deciding whether the state returns a second consecutive BJP government. Annual flooding, riverbank erosion, agricultural distress, and connectivity in this remote north Assam constituency will be the leading concerns in 2026.