Singheshwar Assembly constituency is an assembly constituency in Madhepura district in the Indian state of Bihar. It has been reserved for scheduled castes since 2010. Earlier, it was an open seat.
As per Delimitation of Parliamentary and Assembly constituencies Order, 2008, No. 72 Singheshwar Assembly constituency (SC) is composed of the following: Singheshwar, Shankarpur and Kumarkhand community development blocks.
Singheshwar Assembly constituency is part of No. 8 Supaul (Lok Sabha constituency) from 2010. It was earlier part of Madhepura (Lok Sabha constituency).