Sonpur Assembly constituency

Sonpur Assembly constituency, often spelt Sonepur, is in Saran district in the Indian state of Bihar.

Ram Sundar Das, sitting MLA from Sonpur 1977–1980, served as Bihar's Chief Minister briefly in 1979.

Overview
As per Delimitation of Parliamentary and Assembly constituencies Order, 2008, No. 122 Sonpur Assembly constituency is composed of the following: Sonpur and Dighwara C.D. blocks.

Sonpur Assembly constituency is part of No. 20 Saran (Lok Sabha constituency). It was earlier part of Chapra (Lok Sabha constituency).

2015

 * Ramanuj Prasad Yadav (RJD): 86,082 votes
 * Vinay Kumar Singh (BJP): 49,686 votes

1980 Vidhan Sabha

 * Lalu Prasad Yadav (Janata-Secular): 45,041 votes
 * Jawahar Prasad Singh (Indira Congress): 35,874 votes
 * Ram Sunder Das (Janata Party): 10,396 votes

1977 Vidhan Sabha

 * Ram Sunder Das (JNP): 40,747 votes
 * Rameshwar Prasad Rai (IND): 15,411 votes