Tiruchirappalli (pronunciation) (formerly Trichinopoly in English), also called Tiruchi or Trichy, is a major tier II city in the Indian state of Tamil Nadu and the administrative headquarters of Tiruchirappalli district. It is the fourth largest city as well as the fourth largest urban agglomeration in the state. Located 322 km south of Chennai and 374 km north of Kanyakumari, Tiruchirappalli sits almost at the geographic centre of the state. The Cauvery Delta begins 16 km 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. The city occupies an area of 167.23 km2 and had a population of 916,857 in 2011.