S.N. Sinha College came into existence in July 1970 as a fruition of the efforts made by the late Shyam Narayan Singh of Ainwa village and the chairman of the Jehanabad Municipality/notified area for several years. The easy access to the college was one of the reasons that about 500 students got enrolled in the very year of the establishment. The naming of the college after Satyendra Narayan Sinha, the well-known educationist, who also graced the offices of the Education Minister and the Chief Minister of Bihar sent a very positive message about the objective of the college. Mrs. Tarkershari Sinha, the former Cabinet Minister, officially inaugurated the college in July 1970.

The missionary zeal with which the Founder Secretary late Shyam Narayan Singh and the founder Principal Ramadhar Singh founded the College did not cease with the conversion of the college from an affiliated unit to a constituent unit of the Magadh University, Bodh Gaya in September 1980.

Despite the easy access to the means of the communications, the location of the college is closer to the suburban, rural urban and rural areas of the district. The urbanization is mostly in the east-southern part of the railway station whereas the college is situated to the west of the railway station. Naturally, the majority of the students enrolled here belong to the BPL, SC and ST classes. The girls, again, outnumber the boys in terms of enrollment.