Sihnaula is a village in Mainatanr tehsil in district of Pashchim Champaran, Bihar, India. As per the data provided by Census of India in 2011, total population of Sihnaula was 1,262 which includes 632 males and 630 females. Sihnaula covers 249.6 ha area. Pincode of Sihnaula is N/A.