Budaun, a town and district of British India, in the Rohilkhand division of the United Provinces. The town is near the left bank of the river Sot. Pop. (1901) 39,031. There are ruins of an immense fort and a very handsome mosque of imposing size, crowned with a dome, and built in 1223 in great part from the materials of an ancient Hindu temple. The American Methodist mission maintains several girls' schools, and there is a high school for boys. According to tradition Budaun was founded about A.D. 905, and an inscription, probably of the 12th century, gives a list of twelve Rathor kings reigning at Budaun (called Vodamayuta). The first authentic historical event connected with it, however, is its capture by Kutb-ud-din in 1196, after which it became a very important post on the northern frontier of the Delhi empire. In the 13th century two of its governors, Shams-ud-din Altamsh, the builder of the great mosque referred to above, and his son Rukn-ud-din Firoz, attained the imperial throne. In 1571 the town was burnt, and about a hundred years later, under Shah Jahan, the seat of the governorship was transferred to Bareilly; after which the importance of Budaun declined. It ultimately came into the power of the Rohillas, and in 1838 was made the headquarters of a British district.

In 1857 the people of Budaun sided with the mutineers, and a native government was set up, which lasted until General Penny's victory at Kakrala (April 1858) led to the restoration of British authority.

The District Of Budaun has an area of 1987 sq. m. Pop. (1901) 1,025,753. The country is low, level, and is generally fertile, and watered by the Ganges, the Ramganga, the Sot or Yarwafadar, and the Mahawa. Budaun district was ceded to the British government in 1801 by the nawab of Oudh. There are several indigo factories. The district is crossed by two lines of the Oudh & Rohilkhand railway, and by a narrow-gauge line from Bareilly. The chief centre of trade is Bilsi.