Tiruchirappalli, also called Tiruchi or Trichy, is a city in the Indian state of Tamil Nadu and the administrative headquarters of Tiruchirappalli District. It is the fourth largest municipal corporation and the fourth largest urban agglomeration in the state. Located 322 kilometres (200 mi) south of Chennai and 379 kilometres (235 mi) north of Kanyakumari, Tiruchirappalli sits almost at the geographic centre of the state. The Kaveri 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.