Mohanpur, Sultanganj

As of 2011, Mohanpur had a population of 1,497, in 243 households.^[1]: 167 This population was 52.5% male (771) and 48.5% female (726). The 0-6 age group numbered 266 (132 male and 134 female), or 17.8% of the total population. 622 residents were members of Scheduled Castes, or 41.5% of the total.^{[2]: 130–1}

The 1981 census recorded Mohanpur as having a population of 749 people, in 134 households.^{[3]: 170–1}

The 1961 census recorded Mohanpur as comprising 1 hamlet, with a total population of 490 people (260 male and 230 female), in 87 households and 68 physical houses. The area of the village was given as 403 acres.^[4]: xciv

As of 2011, Mohanpur had 1 primary school; it did not have any healthcare facilities. Drinking water was provided by hand pump and tube well/borehole; there were no public toilets. The village had a post office but no public library; there was at least some access to electricity for all purposes. Streets were made of both kachcha and pakka materials.^{[1]: 167–72}