Madhaulsani is a village in Runisaidpur tehsil in district of Sitamarhi, Bihar, India. As per the data provided by Census of India in 2011, total population of Madhaulsani was 4,474 which includes 2,383 males and 2,091 females. Madhaulsani covers 347 ha area. Pincode of Madhaulsani is 843117.