Chainpur Assembly constituency is one of 243 constituencies of legislative assembly of Bihar.

It comes under Sasaram Lok Sabha constituency.

[1] Chainpur comprises Community Blocks of Chand, Chainpur, Adhaura & Bhagwanpur.The constituency has a preponderance of voters belonging to Kushwaha and Kurmi caste.

The Brahmins and Kayastha stand second only to the twin caste of Kushwaha-Kurmi in population, in this constituency.

[2]