Bochahan (Vidhan Sabha constituency) (Hindi: बोचहा विधान सभा निर्वाचन क्षेत्र) is an assembly constituency in Muzaffarpur district in the Indian state of Bihar. It is reserved for scheduled castes.
As per Delimitation of Parliamentary and Assembly constituencies Order, 2008, No. 91 Bochahan (Vidhan Sabha constituency) (SC) is composed of the following: Adi Gopalpur, Balthi Rasulpur, Bhootane, Deogan, Karanpur North, Karanpur South, Lohsari, Maidapur, Majhauli, Sahila Rampur, Sarfuddinpur, Unsar and Vishunpur Jagdish gram panchayats of Bochahan community development block; Abdul Nagar Urf Madhopur, Baikatpur, Barajagannath, Bhikhanpur, Chhapra Megh, Dumri, Jamalabad, Jhapahan, Kanauli Vishundutta, Khabra, Manika Harikesh, Manika Vishunpur Chand, Mushahri Alias Radha Nagar, Narauli, Prahladpur, Rajwara Bhagwan, Rohua, Sahbazpur, Shekhpur, Sherpur, Susta and Taraura Gopalpur gram panchayats of Mushahri CD Block.
Bochahan (Vidhan Sabha constituency) is part of No. 15 Muzaffarpur (Lok Sabha constituency).
Election results 
In the 2010 state assembly elections, Ramai Ram of JD(U) won the Bochahan assembly seat defeating his nearest rival Musafir Paswan of RJD. Contests in most years were multi cornered but only winners and runners are being mentioned. Ramai Ram representing RJD defeated Shiv Nath Chaudhary of JD(U) in October 2005 and February 2005, and Musafir Paswan representing JD(U) in 2000. Ramai Ram of JD defeated Musafir Paswan representing SAP in 1995 and Ram Pratap Niraj of Congress in 1990. Ramai Ram of LD defeated Hari Lal Ram of Congress in 1985. Ramai Ram of Janata Party (JP) defeated Righan Ram of CPI in 1980. Kamal Paswan of JP defeated Hari Lal Ram of Congress in 1977.