 Before delimitation the district was divided into 12 assembly constituencies (AC): Nanoor (AC # 283), Bolpur (AC # 284), Labhpur (AC # 285), Dubrajpur (AC # 286), Rajnagar (AC # 287), Suri (AC # 288), Mahammad Bazar (AC # 289), Mayureswar (AC # 290), Rampurhat (AC # 291), Hansan (AC # 292), Nalhati (AC # 293) and Murarai (AC # 294). The constituencies of Nanoor, Rajnagar, Mayureswar and Hansan were reserved for Scheduled Castes (SC) candidates.Vidhan Sabha was elected in 2006 assembly elections, which took place before the rearrangement of parliamentary and assembly constituencies as per order of the Delimitation Commission in respect of the delimitation of constituencies in the West Bengal. Delimitation was made effective for all elections in the state of West Bengal that was held on or after 19 February 2008. Indian general election, 2009 was based on the newly formed parliamentary constituencies and the newly formed assembly constituencies have representatives in the 2011 elections of West Bengal.
