Nagla Usar () is a village in Kuraoli block of Mainpuri district, Uttar Pradesh, India. As of 2011, it had a population of 1,473, in 228 households.
As of 2011, Nagla Usar had a population of 1,473, in 228 households. This population was 53.0% male (781) and 47.0% female (692). The 0-6 age group numbered 354 (181 male and 173 female), or 24.0% of the total population. 1,468 residents were members of Scheduled Castes, or 99.7% of the total.
The 1981 census recorded Nagla Usar as having a population of 499 people, in 74 households.
As of 2011, Nagla Usar had 1 primary school; it did not have any healthcare facilities. Drinking water was provided by 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.