The total population of Kenya is 50,950,879 people. The people of Kenya speak Swahili and English. The linguistic diversity of Kenya is very diverse according to a fractionation scale which is 0.886 for Kenya. The average age is around 19.1 years. Life expectancy in Kenya is 61 years. The female fertility rate in Kenya is 3.9. About 4% of Kenya's population is obese. Ethnic diversity is very diverse according to a fractionation scale, which for Kenya is 0.8588. Details of the language, religion, age, gender distribution and advancement of the people of Kenya can be found in the sections below, as well as the section on education in the country.

Population
In Kenya, the population density is 78 people per square kilometer (203 per square mile). Based on these statistics, this country is considered sparsely populated. The total population of Kenya is 50,950,879 people. Kenya has approximately 1,084,357 foreign immigrants. Immigrants in Kenya make up 0.4 percent of the total number of immigrants worldwide. Immigrants in Kenya make up 2.2 percent of the total number of immigrants worldwide. The ethnic diversity of Kenya is very diverse according to a fractionation scale based on ethnicity. Ethnic fractionation (EF) is concerned with the number, size, socioeconomic distribution, and geographic location of different cultural groups, usually within a state or other defined 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 Kenya is 0.8588. This means that there is a very large number of unique ethnic groups in Kenya. EF is usually measured as 1 minus the Herfindahl concentration index of ethnolinguistic group proportions, which reflects the probability that two randomly selected 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 statistics for Kenya on average age and gender distribution at different ages.

Old
The average age is around 19.1 years. The average age of men is 18.9 years, while the average age of women is 19.2 years.

Gender
The sex ratio, or number of males per female (estimated at birth), is 1.02. It can be further broken down into the following categories: sex ratio under 15 – 1.01; sex ratio from 15 to 64 - 1.01; 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 estimated sex ratio 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 Kenya is Christianity, whose adherents make up 84.8% of all believers in the country. Christianity is an Abrahamic monotheistic religion based on the life and teachings of Jesus Christ as set forth 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. The religious diversity of Kenya is very diverse according to a fractionation scale based on the number of religions in Kenya. The index of religious fractionalization in Kenya is 0.7765. This value means that several major religions and some smaller faiths coexist in Kenya.