Triveniganj Assembly constituency is an assembly constituency in Supaul district in the Indian state of Bihar. It is reserved for scheduled castes. It was an open seat earlier.
Per Delimitation of Parliamentary and Assembly constituencies Order, 2008, No. 44 Triveniganj Assembly constituency (SC) is composed of the following: Triveniganj and community development blocks.
Triveniganj Assembly constituency is part of No. 8 Supaul (Lok Sabha constituency).