As per Delimitation of Parliamentary and Assembly constituencies Order, 2008, No.

101 Gopalganj Assembly constituency is composed of the following: Gopalganj and Thawe community development blocks; Bairia Durg, Uchkagaon, Chhotka Sankhe, Harpur, Sakhekhas, Parsauni Khas, Nawada Parsauni, Luhsi, Jhirwa and Dahibhata gram panchayats of Uchkagaon CD Block.

17 Gopalganj (Lok Sabha constituency) (SC).

[1] ^ bypoll By polls necessitated by the death of MLA Subhash Singh.

[4] In 2015 Bihar Legislative Assembly election, Gopalganj was one of the 36 seats to have VVPAT enabled electronic voting machines.