Sansarpur (Sansārpur) is a village in Mainpuri block of Mainpuri district, Uttar Pradesh, India. As of 2011, it had a population of 5,182, in 826 households.

As of 2011, Sansarpur had a population of 5,182, in 826 households. This population was 53.7% male (2,783) and 46.3% female (2,399). The 0-6 age group numbered 805 (435 male and 370 female), or 15.5% of the total population. 1,680 residents were members of Scheduled Castes, or 32.4% of the total.

The 1961 census recorded Sansarpur as comprising 4 hamlets, with a total population of 1,726 people (961 male and 765 female), in 345 households and 343 physical houses. The area of the village was given as 1,139 acres.

As of 2011, Sansarpur had 1 primary school; it did not have any healthcare facilities. Drinking water was provided by 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.