Dewamai (), also spelled Deva Mai or Dewa Mai, is a village in Mainpuri block of Mainpuri district, Uttar Pradesh, India. As of 2011, it had a population of 2,920, in 513 households.
As of 2011, Dewamai had a population of 2,920, in 513 households. This population was 53.5% male (1,561) and 46.5% female (1,359). The 0-6 age group numbered 448 (244 male and 204 female), or 15.3% of the total population. 1,252 residents were members of Scheduled Castes, or 42.9% of the total.
The 1981 census recorded Dewamai as having a population of 2,026 people, in 371 households.
The 1961 census recorded Dewamai as comprising 6 hamlets, with a total population of 1,443 people (769 male and 674 female), in 288 households and 237 physical houses. The area of the village was given as 1,036 acres.
As of 2011, Dewamai 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 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.