Bansarmau () is a village in Kishni block of Mainpuri district, Uttar Pradesh. As of 2011, it has a total population of 691, in 114 households.
As of 2011, Bansarmau had a population of 691, in 114 households. This population was 51.4% male (355) and 48.6% female (336). The 0-6 age group numbered 106 (59 male and 47 female), or 15.3% of the total population. 339 residents were members of Scheduled Castes, or 49.1% of the total.
The 1981 census recorded Bansarmau as having a population of 509 people, in 105 households.
The 1961 census recorded Bansarmau as comprising 2 hamlets, with a total population of 335 people (176 male and 159 female), in 70 households and 49 physical houses. The area of the village was given as 351 acres.
As of 2011, Bansarmau had 1 primary school; it did not have any healthcare facilities. Drinking water was provided by tap and hand pump; there were no public toilets. The village did not have a post office or public library; there was at least some access to electricity for all purposes. Streets were made of both kachcha and pakka materials.