The total population of Australia is 24,772,247 people. The people of Australia speak the English language. The linguistic diversity of Australia is diverse according to a fractionation scale, which for Australia is 0.3349. The average age is around 38.3 years. Life expectancy in Australia is 82.1. The female fertility rate in Australia is 1.9. About 27% of Australia's population is obese. Ethnic diversity is nearly uniform according to a fractionation scale, which is 0.0929 for Australia. Details of the language, religion, age, gender distribution and advancement of the people of Australia can be found in the sections below, as well as the section on education in the country.

Population
In Australia, the population density is 2.8 people per square kilometer (7 per square mile). Based on these statistics, this country is considered very sparsely populated. The total population of Australia is 24,772,247 people. Australia has approximately 6,763,663 foreign immigrants. Immigrants in Australia account for 2.8 percent of the total number of immigrants worldwide. Immigrants in Australia account for 27.7 percent of the total number of immigrants worldwide. Australia's ethnic diversity is nearly uniform 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 Australia is 0.0929. This means that the people living in Australia come from a narrow group of ethnicities, all related to one another. 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. Below are Australia statistics on average age and gender distribution at different ages.

Age
The average age is around 38.3 years. The average age of men is 37.5 years and the average age of women is 39 years.

Gender
The sex ratio, or number of males per female (estimated at birth), is 1.055. It can be further broken down into the following categories: sex ratio under 15 - 1.05; sex ratio from 15 to 64 - 1.03; sex ratio over 64 - 0.84; Overall sex ratio - 1. 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
Australia's majority religion is Christianity, whose adherents make up 67.3% 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. Besides Christianity, there are several other religions in the country. Other religions in Australia are Islam, Hinduism, Buddhism, folk religions, Judaism. Australia's religious diversity is very diverse according to a fractionation scale based on the number of religions in Australia. The Index of Religious Fractionalization in Australia is 0.8211. This score means that several major religions in Australia coexist with each other and with some subordinate beliefs.