Mau is one of the districts of Uttar Pradesh state of India, and Mau town is the district headquarters. Mau district is a part of Azamgarh Division. It is situated in the south-eastern part of the state with headquarters in Maunath Bhanjan. The district is surrounded by Ghazipur district on the south, Ballia district in the east, Azamgarh district in the west, and by Gorakhpur and Deoria districts on the north.

According to the 2011 census Mau Nath Bhanjan district has a population of 2,205,170, in which male and female were 1,114,888 and 1,090,282 respectively. In 2001 census, Mau had a population of 1,853,997, in which males were 933,523 and remaining 920,474 were females.roughly equal to the nation of Latvia or the US state of New Mexico.This gives it a ranking of 206th in India (out of a total of 640).The district has a population density of 1,287 inhabitants per square kilometre (3,330/sq mi).Its population growth rate over the decade 2001-2011 was 18.94%.Mau has a sex ratio of 978 females for every 1000 males, and a literacy rate of 75.16%.There are many towns and bazars located in the districts like Kopaganj, Ghosi, Amila, Dohrighat, Mandi-Sipah Madhuban, Mohammadabd Gohana and Indara.