Belahar (Belāhār) is a village in Kuraoli block of Mainpuri district, Uttar Pradesh, India. As of 2011, it had a population of 1,900, in 317 households.

As of 2011, Belahar had a population of 1,900, in 317 households. This population was 51.9% male (987) and 48.1% female (913). The 0-6 age group numbered 303 (150 male and 153 female), or 15.9% of the total population. 153 residents were members of Scheduled Castes, or 8.1% of the total.

The 1981 census recorded Belahar as having a population of 1,190 people, in 220 households.

The 1961 census recorded Belahar as comprising 4 hamlets, with a total population of 1,066 people (566 male and 500 female), in 200 households and 130 physical houses. The area of the village was given as 1,173 acres.

As of 2011, Belahar had 2 primary schools; 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 public library but no post office; there was at least some access to electricity for all purposes. Streets were made of both kachcha and pakka materials.