Dumraon Assembly constituency is one of 243 constituencies of legislative assembly of Bihar. It comes under Buxar Lok Sabha constituency.
Dumraon comprises Community Blocks of Chaugain, Kesath & Nawanagar; Gram Panchayats of Chilhari, Kushalpur, Bhojpur Kadim, Bhojpur Jadid, Chhatanwar, Nuaon, Sowan, Ariaon, Nandan, Lakhan Dihra & Dumraon (M) of Dumraon CD Block.