The island country of Tonga can be divided into 5 divisions and 23 districts.
The government provides comprehensive medical and dental facilities for residents and visitors. There are hospitals in Vaiola (Tongatapu), Hihifo (Ha'apai) and Neiafu (Vava'u), which will treat minor ailments and dispense medicines.
The population of Tonga is 106,146 (July 2011 est.). 37.2% are under 15, 56.7% 15 to 64, and 6.1% over 64. The birth rate is 24.7/1000, the death rate is 4.88/1000, and the net migration rate is -17.9/1,000.