Udagamandalam, and abbreviated as Udhagai and popularly known as Ooty, is a town and a municipality in the Indian State of Tamil Nadu. It is located 86 km north of Coimbatore and 128 km south of Mysore and is the headquarters of the Nilgiris district. It is a popular hill station located in the Nilgiri Hills.

Originally occupied by the Toda people, the area came under the rule of the East India Company at the end of the 18th century. The economy is based on tourism and agriculture, along with the manufacture of medicines and photographic film. The town is connected by the Nilgiri ghat roads and Nilgiri Mountain Railway. Its natural environment attracts tourists and it is a popular summer destination. In 2011, the town had a population of 88,430.