At birth, the sex ratio in Tonga is 1.03 males/female; the ratio in the total population is 1.01 males/female. The 2006 Tongan census gave a fertility rate of 4.2 children/woman,although the 2011 World Factbook estimate is 3.55 children/woman.
Most of the Tongan population is Polynesian, with about 300 Europeans.
Christianity is the predominant religion in Tonga, with 37.3% of the population belonging to the Free Wesleyan Church, 16.8% Mormon, 15.6% Free Church of Tonga, and 11.3% Roman Catholic. Other Christian denominations make up 14%. Other religions make up 4% of the population, while 1% claim no affiliation.
Languages
The indigenous languages of the Kingdom of Tonga are the two Austronesian languages of Tongan and Niuafo'ou. Along with Tongan, English is also an official language.
98.5% of the Tongan population can read and write either English or Tongan, as of 1996.