As a consequence of the orders of the Delimitation Commission of India, Dalsinghsarai Assembly constituency ceased to exist in 2010.
[2] In the October 2005 Bihar Assembly elections, Ram Lakhan Mahato of RJD won the Dalsinghsarai seat defeating his nearest rival Sheel Kumar Roy of LJP.
Ram Padarnath Mahto of RJD defeated Vijay Kumar Chaudhary of Indian National Congress in 2000.
Following the death of sitting legislator Jagdish Prasad Choudhary, Vijay Kumar Chaudhary of Indian National Congress defeated Ram Padarath Mahto of Janata Party in a by-election in 1982.
Jagdish Prasad Choudhary of Congress (I) defeated Ram Padarnath Mahto of Janata Party (SC).