Tiruchirappalli, also called Trichy, is a major tier II city in the Indian state of Tamil Nadu and the administrative headquarters of Tiruchirappalli District. Trichy is the fourth largest city as well as the fourth largest urban agglomeration in the state. Located 322 kilometres (200 mi) south of Chennai and 374 kilometres (232 mi) north of Kanyakumari, Tiruchirappalli sits almost at the geographic centre of the state. The Cauvery Delta begins 16 kilometres (9.9 mi) west of the city where the Kaveri river splits into two, forming the island of Srirangam, which is now incorporated into the Tiruchirappalli City Municipal Corporation. Occupying 167.23 square kilometres (64.57 sq mi), the city was home to 916,857 people in 2011.