The total population of Poland is 38,104,832 people. People in Poland speak the Polish language. The linguistic diversity of Poland is almost homogeneous according to a fractionation scale, which is 0.0468 for Poland. The average age is around 39.5 years. Life expectancy in Poland is 77 years. The female fertility rate in Poland is 1.3. Around 25% of the Polish population is obese. Ethnic diversity is nearly uniform according to a fractionation scale, which is 0.1183 for Poland. Details of the language, religion, age, gender distribution and advancement of the people of Poland can be found in the sections below, as well as the section on education in the country.

Population
In Poland, the population density is 123 people per square kilometer (320 per square mile). Based on these statistics, this country is considered densely populated. The total population of Poland is 38,104,832 people. Poland has approximately 619,403 foreign immigrants. Immigrants in Poland make up 0.3 percent of the total number of immigrants worldwide. Immigrants in Poland make up 0.9 percent of the total number of immigrants worldwide. The ethnic diversity of Poland is almost uniform according to a fractionation scale based on ethnicity. 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 Poland is 0.1183. This means that people living in Poland come from a narrow group of ethnic groups, all of which are 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. Read Poland's median age and gender distribution statistics at different ages below.

Age
The average age is around 39.5 years. The average age of men is 37.9, the average age of women is 41.3.

Gender
The sex ratio, or number of males per female (estimated at birth), is 1.06. It can be further broken down into the following categories: sex ratio below 15 - 1.06; sex ratio from 15 to 64 - 0.99; sex ratio over 64 - 0.62; Overall sex ratio - 0.94. 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 Poland is Christianity, whose adherents make up 94.3% 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 Poland are Hinduism, Buddhism. Poland's religious diversity is vaguely diverse according to a fractionation scale based on the number of religions in Poland. The index of religious fractionation in Poland is 0.1712. This score means that within the country there is a major belief with a few other subordinate beliefs.