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The total population of New Zealand is 4,749,598 people. The people of New Zealand speak English and Māori. New Zealand's linguistic diversity is vaguely diverse according to a fractionation scale, which is 0.1657 for New Zealand. The average age is around 37.6 years. Life expectancy in New Zealand is 82. Female fertility rate in New Zealand is 1.9. Around 28% of New Zealand's population is obese. Ethnic diversity is diverse according to a fractionation scale, which for New Zealand is 0.3969. Details of the language, religion, age, gender distribution and advancement of the people of New Zealand can be found in the sections below, as well as the section on education in the country.

Population
In New Zealand, the population density is 17.12 people per square kilometer (45 per square mile). Based on these statistics, this country is considered sparsely populated. The total population of New Zealand is 4,749,598 people. New Zealand has approximately 1,039,736 foreign immigrants. Immigrants in New Zealand account for 0.5 percent of the total number of immigrants worldwide. Immigrants in New Zealand account for 25.1 percent of the total number of immigrants worldwide. The ethnic diversity of New Zealand is diverse according to an ethnicity-based fractionation scale. Ethnic Fractionation (EF) deals with the number, size, socioeconomic distribution, and geographic location of diverse cultural groups, usually within a state or some other demarcated area. Specific cultural characteristics can refer to language, skin color, religion, ethnicity, customs and traditions, history, or other distinctive criteria, alone or in combination. These characteristics are often used for social exclusion and power monopolization. The index of ethnic fractionation in New Zealand is 0.3969. This means that there is some diversity in New Zealand, although all people can still be divided into a relatively small number of major ethnic groups. EF is usually measured as 1 minus the Herfindahl concentration index of ethnolinguistic group proportions, which reflects 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 the New Zealand statistics on the average age and gender distribution at different ages.

Age
The average age is around 37.6 years. The average age for men is 36.7 and the average age for women is 38.4.

Gender
The sex ratio, or number of males per female (estimated at birth), is 1.05. It can be further broken down into the following categories: sex ratio under 15 - 1.05; sex ratio from 15 to 64 - 1; sex ratio over 64 - 0.84; Overall sex ratio - 0.99. The overall sex ratio differs from the sex ratio estimated at birth. This is because some newborns are included in the sex ratio estimated at birth, but die within the first few weeks of life and are not included in the overall sex ratio.

Religion
The majority religion in New Zealand is Christianity, whose adherents make up 57% 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 largest religion in the world with over 2.4 billion followers known as Christians. Christians believe that Jesus is the Son of God and the Savior of mankind, whose coming as Christ or Messiah was prophesied in the Old Testament. In addition to Christianity, there are some followers of Buddhism in New Zealand. New Zealand's religious diversity is very diverse according to a fractionation scale based on the number of religions in New Zealand. The Index of Religious Fractionalization in New Zealand is 0.811. This score means that several major religions in New Zealand coexist with each other and with some subordinate beliefs.

General development
New Zealand is considered a developed nation. A nation's stage of development is determined by a number of factors including, but not limited to, economic prosperity, life expectancy, income equality and quality of life. As a developed nation, New Zealand is able to offer its citizens social services such as public education, health care and law enforcement. Citizens of developed nations enjoy a high standard of living and longer life expectancies than citizens of developing nations. In New Zealand, 89.51 in every 100 people use internet. New Zealand has a Human Development Index (HDI) of 0.91. New Zealand has a very high HDI score. This indicates that nearly all citizens are able to attain a desirable life because of social and economic support; citizens with a low standard of living receive aid and support and have the opportunity to advance in society. The migration rate in New Zealand is 2.21%. In New Zealand, 12% of the population lives below the poverty line. The percentage of citizens living below the poverty line in New Zealand is low, indicating that it has a stable economy. Investors should consider New Zealand to be a safe location for investments and other financial ventures.