Sihniapatti is a village in Sursand tehsil in district of Sitamarhi, Bihar, India. As per the data provided by Census of India in 2011, total population of Sihniapatti was 1,886 which includes 1,017 males and 869 females. Sihniapatti covers 199.1 ha area. Pincode of Sihniapatti is N/A.