Bhabua is one of 243 constituencies of legislative assembly of Bihar. It comes under Sasaram Lok Sabha constituency.
Bhabua comprises Community Blocks of Bhabua & Rampur. The constituency has a preponderance of voters belonging to Koeri and Kurmi caste. The Brahmins and Kayasthas stand second only to the twin caste of Koeri-Kurmi in population, in this constituency.