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The total population of Tonga is 109,008 people. People in Tonga speak the Tongan, and English languages. The linguistic diversity of Tonga is diverse according to a fractionalization scale which for Tonga is 0.3782. The median age is approximately 22 years. Life expectancy in Tonga is 71. The female fertility rate in Tonga is 3.9. Around 58.% of the population of Tonga are obese. The ethnic diversity is almost uniform according to a fractionalization scale which for Tonga is 0.0869. To find out specifics of language, religion, age, gender distribution, and advancement of people in Tonga see the sections below, as well as visit the section concerning the education in the country.

Population
In Tonga, the population density is 145 people per square kilometer (377 per square mile). Because of this statistic, this country is considered to be densely populated. The total population of Tonga is 109,008 people. Tonga has approximately 5,731 foreign immigrants. Immigrants in Tonga represent 0.1 percent of the total number of immigrants in the world. Immigrants in Tonga represent 4.8 percent of the total number of immigrants in the world. The ethnic diversity of Tonga is almost uniform according to a fractionalization scale based on ethnicity. Ethnic fractionalization (EF) deals with the number, sizes, socioeconomic distribution, and geographical location of distinct cultural groups, usually in a state or some otherwise delineated territory. Specific cultural features might refer to language, skin color, religion, ethnicity, customs and traditions, history, or other distinctive criteria, alone or in combination. Frequently, these features are used for social exclusion and the monopolization of power. The index of ethnic fractionalization in Tonga is 0.0869. This means that the people living in Tonga are coming from a narrow group of ethnicities, all of which are related to one another. EF is usually measured as 1 minus the Herfindahl concentration index of ethnolinguistic group shares, which reproduces the probability that two randomly drawn individuals from the population belong to different groups. The theoretical maximum of EF of 1 means that each person belongs to a different group. Read below for statistics of Tonga on median age and gender distribution at various ages.

Age
The median age is approximately 22 years. The median age for men is 21.6, while the median age for women is 22.5.

Gender
The sex ratio, or the number of males for each female (estimated at birth), is 1.05. It can be further divided into the following categories: sex ratio under 15 - 1.04; sex ratio from 15 to 64 - 0.99; sex ratio over 64 - 0.71; total sex ratio - 0.99. Total sex ratio is different from sex ratio estimated at birth. This is due to the fact that some newborns are considered in the sex ratio estimated at birth but pass away within the first weeks of their life and are not included in the total sex ratio.

Religion
The majority religion of Tonga is Christianity, the followers of which comprise 98.9% of all religious believers in the country. Christianity is an Abrahamic monotheistic religion based on the life and teachings of Jesus Christ as presented in the New Testament. Christianity is the world's largest religion, with over 2.4 billion adherents, known as Christians. Christians believe that Jesus is the Son of God and the savior of humanity whose coming as Christ or the Messiah was prophesied in the Old Testament. The religious diversity of Tonga is rather diverse according to a fractionalization scale based on the number of religions in Tonga. The index of religious fractionalization in Tonga is 0.6214. This score means that there are several major religions distributed evenly within Tonga.

General development
Tonga is considered to be a developing nation. The developmental stage of a nation is determined by a number of factors including, but not limited to, economic prosperity, life expectancy, income equality, and quality of life. As a developing nation, Tonga may not be able to offer consistent social services to its citizens. These social services may include things like public education, reliable healthcare, and law enforcement. Citizens of developing nations may have lower life expectancies than citizens of developed nations. In Tonga, 34.86 in every 100 people use internet. Tonga has a Human Development Index (HDI) of 0.705. Tonga has an upper medium HDI score. This indicates that the majority of citizens will be able to attain a desirable life, though some citizens will not be able to achieve high living standards. The migration rate in Tonga is -17.84%. In Tonga, 24% of the population lives below the poverty line. The percentage of citizens living below the poverty line in Tonga is fairly high, but is not reason for complete concern with regard to investments. Potential financial backers should look at other economic markers, including GDP, urbanization rate, and strength of currency, before making any decisions regarding investments.

Language
People in Tonga speak the Tongan, and English languages. The linguistic diversity of Tonga is diverse according to a fractionalization scale based on the number of unrelated languages spoken in Tonga. The index of linguistic fractionalization in Tonga is 0.3782. This means that there are a few major languages spoken in Tonga. Unrelated languages share few characteristics of grammatical structure, vocabulary, and etymological heritage. Linguistic diversity often results in issues of social and cultural fractionalization that can impact a country’s political circumstance and public policies.