Madhau () is a village in Mainpuri block of Mainpuri district, Uttar Pradesh, India. As of 2011, it had a population of 4,118, in 719 households.
As of 2011, Madhau had a population of 4,118, in 719 households. This population was 52.8% male (2,176) and 47.2% female (1,942). The 0-6 age group numbered 703 (361 male and 342 female), or 17.1% of the total population. 1,081 residents were members of Scheduled Castes, or 26.3% of the total.
The 1981 census recorded Madhau as having a population of 1,658 people, in 284 households.
The 1961 census recorded Madhau as comprising 4 hamlets, with a total population of 1,086 people (607 male and 479 female), in 183 households and 145 physical houses. The area of the village was given as 609 acres.
As of 2011, Madhau had 3 primary schools; 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.