Udumalai also known as Udumalaipettai is a town in Udumalaipettai taluk of the Tirupur district in the Indian state of Tamil Nadu. Earlier it was under Coimbatore District Indian state of Tamil Nadu. As it is called, Udumalpet town is one of the famous summer resorts of Tamil Nadu, surrounded by Mountains on three sides. Along with Pollachi, it is one of the twin cities separated from Coimbatore. As of 2011, the town had a population of 61,133,