Kochadhaman is an assembly constituency in Kishanganj district in the Indian state of Bihar.

As per Delimitation of Parliamentary and Assembly constituencies Order, 2008, No 55 Kochadhamin Assembly constituency is composed of the following: Kochadhamin community development block; Belwa, Gachhpara, Chakla, Mehangaon, Daula and Pichhla gram panchayats of Kishanganj CD Block.

[1] Kochadhaman Assembly constituency is part of No 10 Kishanganj (Lok Sabha constituency).

[1] Following is the list of Members of Legislative Assembly from Kochadhaman Vidhan Sabha.

[2][3] ^denotes by-election