The CIA composed the World Factbook which was last updated in 2015. It provides information on the history, people, government, economy, energy, geography, communications, transportation, military, and transnational issues for 267 world entities. The information below is all found the the Factbook.
An estimate of the country’s population in 2014 was nearly 46 million. There are over 70 different ethnic groups in Kenya. The biggest one is the Kikuyu with about 7 million and the smallest one is the El Molo with 500 people. The five biggest ethnics groups, account for 70 percent of the nation’s total population. These are the Kikuyu, the Luo, the Luhya, the Kamba and the Kalenjin. The ethnic groups can be divided into three linguistic groups: Bantu, Nilotic and Cushite. The majority of the people belong to the Bantu and Nilotic groups, only two percent belongs to the Cushitic group.
Nearly 42 percent of the total population are children under the age of 14. Another third of the population is aged between 25 en 54 years and a little over 18 percent is between 15 and 24 and just over 6 percent is 55 years or older. The median age is 19,3 and the average life expectation is 63,8 years old.
The majority of the people of Kenya is Christian (82,5 %), of which 47 percent is Protestant and 23 percent is Catholic. About 11,1 percent of the population is Muslim, 1,6 percent Traditiolism, 1,7 percent has an other religion and roughly 2,4 percent has no religion.