Ramaihar is a village in Mainpuri block of Mainpuri district, Uttar Pradesh. As of 2011, it has a population of 1,244, in 210 households.
As of 2011, Ramaihar had a population of 1,244, in 210 households. This population was 52.5% male (653) and 47.5% female (591). The 0-6 age group numbered 218 (130 male and 88 female), or 17.5% of the total population. 214 residents were members of Scheduled Castes, or 17.2% of the total.
The 1981 census recorded Ramaihar as having a population of 548 people, in 112 households.
The 1961 census recorded Ramaihar as comprising 1 hamlet, with a total population of 358 people (188 male and 170 female), in 76 households and 62 physical houses. The area of the village was given as 94 acres.
As of 2011, Ramaihar had 2 primary schools; it did not have any healthcare facilities. Drinking water was provided by hand pump and tube well/borehole; 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.