The total population of Australia is 24,772,247 people. People in Australia speak the English language. The linguistic diversity of Australia is diverse according to a fractionalization scale which for Australia is 0.3349. The median age is approximately 38.3 years. Life expectancy in Australia is 82.1. The female fertility rate in Australia is 1.9. Around 27% of the population of Australia are obese. The ethnic diversity is almost uniform according to a fractionalization scale which for Australia is 0.0929. To find out specifics of language, religion, age, gender distribution, and advancement of people in Australia see the sections below, as well as visit the section concerning the education in the country.

Population
In Australia, the population density is 2.8 people per square kilometer (7 per square mile). Because of this statistic, this country is considered to be very sparsely. The total population of Australia is 24,772,247 people. Australia has approximately 6,763,663 foreign immigrants. Immigrants in Australia represent 2.8 percent of the total number of immigrants in the world. Immigrants in Australia represent 27.7 percent of the total number of immigrants in the world. The ethnic diversity of Australia 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 Australia is 0.0929. This means that the people living in Australia 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 Australia on median age and gender distribution at various ages.

Age
The median age is approximately 38.3 years. The median age for men is 37.5, while the median age for women is 39.

Gender
The sex ratio, or the number of males for each female (estimated at birth), is 1.055. It can be further divided into the following categories: sex ratio under 15 - 1.05; sex ratio from 15 to 64 - 1.03; sex ratio over 64 - 0.84; total sex ratio - 1. 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 Australia is Christianity, the followers of which comprise 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 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. Besides Christianity, there are several other religions present within the country. Other religions in Australia are Islam, Hinduism, Buddhism, folk religions, Judaism. The religious diversity of Australia is very diverse according to a fractionalization 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 within Australia co-exist with one another and with some minor beliefs.

General development
Australia is considered to be a developed 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 developed nation, Australia is able to provide its citizens with social services like public education, healthcare, and law enforcement. Citizens of developed nations enjoy a high standard of living and longer life expectancies than citizens of developing nations. In Australia, 82.35 in every 100 people use internet. Australia has a Human Development Index (HDI) of 0.933. Australia 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