Muhammadpur Nagariya (Muhammadpur Nagariyā), also spelled Nagaria, is a village in Karhal block of Mainpuri district, Uttar Pradesh. As of 2011, it has a population of 2,631, in 498 households.

As of 2011, Muhammadpur Nagariya had a population of 2,631, in 498 households. This population was 53.6% male (1,410) and 46.4% female (1,221). The 0-6 age group numbered 436 (224 male and 214 female), or 16.6% of the total population. 1,003 residents were members of Scheduled Castes, or 38.1% of the total.

The 1961 census recorded Muhammadpur Nagariya (as "Mohammadpur Najariya") as comprising 3 hamlets, with a total population of 960 people (514 male and 446 female), in 181 households and 158 physical houses. The area of the village was given as 675 acres.

As of 2011, Muhammadpur Nagariya had 3 primary schools; it did not have any healthcare facilities. Drinking water was provided by well, hand pump, and tube well; 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.