Gamhira (Gamhirā), also spelled Gambhira (Gambhīrā), is a village in Karhal block of Mainpuri district, Uttar Pradesh. As of 2011, it has a population of 1,250, in 214 households.

There is a prominent jhil at Gamhira.

As of 2011, Gamhira had a population of 1,250, in 214 households. This population was 52.1% male (651) and 47.9% female (599). The 0-6 age group numbered 202 (113 male and 89 female), or 16.2% of the total population. 283 residents were members of Scheduled Castes, or 22.6% of the total.

The 1961 census recorded Gamhira (as "Gambhira") as comprising 3 hamlets, with a total population of 568 people (311 male and 257 female), in 94 households and 86 physical houses. The area of the village was given as 600 acres.

As of 2011, Gamhira had 1 primary school; 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.