Sagauni () is a village in Mainpuri block of Mainpuri district, Uttar Pradesh. As of 2011, it has a population of 4,507, in 720 households.
As of 2011, Sagauni had a population of 4,507, in 720 households. This population was 54.3% male (2,446) and 45.7% female (2,061). The 0-6 age group numbered 645 (360 male and 285 female), or 14.3% of the total population. 239 residents were members of Scheduled Castes, or 5.3% of the total.
The 1981 census recorded Sagauni as having a population of 2,967 people, in 478 households.
The 1961 census recorded Sagauni as comprising 4 hamlets, with a total population of 1,907 people (995 male and 912 female), in 369 households and 267 physical houses. The area of the village was given as 1,527 acres.
As of 2011, Sagauni 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 kachcha materials.