Sidli Chirang Assembly constituency is one of the 126 constituencies in the Assam Legislative Assembly, a Scheduled Tribes (ST) reserved seat redrawn and renamed from the former Sidli constituency in the 2023 delimitation exercise to reflect its geographic reach across both the Sidli area and the former Chirang district. It falls under the Kokrajhar Lok Sabha segment within the Bodoland Territorial Region.
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).
In the 2021 Assam Assembly elections (contested as Sidli), UPPL's Nirmal Kumar Brahma won, defeating BPF's Suddho Kumar Basumatary by 31,320 votes — a decisive UPPL margin reflecting the NDA-aligned Bodoland alliance's strength. In 2026, BJP's Paniram Brahma contests against Congress's Matilal Narzary for the redrawn and renamed Sidli Chirang 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.