Sani Bagahi is a village in Bhagwanpur Hat tehsil in district of Siwan, Bihar, India. As per the data provided by Census of India in 2011, total population of Sani Bagahi was 1,515 which includes 685 males and 830 females. Sani Bagahi covers 81 ha area. Pincode of Sani Bagahi is N/A.