Marhaura is an assembly constituency in Saran district in the Indian state of Bihar.
As per Delimitation of Parliamentary and Assembly constituencies Order, 2008, No. 117 Marhaura Assembly constituency is composed of the following: Marhaura and Nagra community development blocks.
Marhaura Assembly constituency is part of No. 20 Saran (Lok Sabha constituency). It was earlier part of Chapra (Lok Sabha constituency).