Sajnupur Mathihan is a village in Dariapur tehsil in district of Saran, Bihar, India. As per the data provided by Census of India in 2011, total population of Sajnupur Mathihan was 4,214 which includes 2,211 males and 2,003 females. Sajnupur Mathihan covers 196 ha area. Pincode of Sajnupur Mathihan is 841207.