Dhamdaha (Vidhan Sabha constituency) (Hindi: ) is an assembly constituency in Purnia district in the Indian state of Bihar. Lesi Singh is the current MLA from Damdaha.As per Delimitation of Parliamentary and Assembly constituencies Order, 2008, No 61. Dhamdaha (Vidhan Sabha constituency) is composed of the following: Dhamdaha community development blocks; Banbhag Chunapur, Bithnouli Khemchand East, Bithnouli Khemchand West, Ganeshpur, Gangaili, Gowasi, Kajha, Majra, Parora, Rahuwa, Sahara, Satkodariya, Gokulpur, Jagni and Pothia Rampur of Krityanand Nagar CD Block.[2] Dhamdaha (Vidhan Sabha constituency) is part of No 12 Purnia (Lok Sabha constituency).n the 2010 state assembly elections, Leshi Singh of JD(U) won the Dhamdaha assembly defeating his nearest rival Irshad Ahmad Khan of Congress.[3] Contests in most years were multi cornered but only winners and runners are being mentioned. Dilip Kumar Yadav of RJD defeated Leshi Singh of JD(U) in October 2005. Leshi Singh of JD(U) defeated Dilip Kumar Yadav of RJD in February 2005. Lesha Devi of SAP defeated Dilip Kumar Yadav of RJD in 2000. Dilip Kumar Yadav of JD defeated Madhusudan Singh, Independent, in 1995. Amar Nath Tiwari of Congress defeated Surya Narayan Singh Yadav of JD/ LD in 1990 and 1985. Surya Narayan Singh Yadav of Janata Party (Secular Charan Singh) defeated Jai Narayan Mehta of Congress in 1980. Surya Narayan Singh Yadav of JP defeated Ram Narayan Mandal of Congress.
