As of May 2026, the population of Kenya is 58.3 million. The number of inhabitants has increased by 1 million in the last year, representing a growth of 1.98%. The median age of the population has increased in recent years, rising from 18.1 years in 2016 to 20.4 years in 2026. Currently, life expectancy at birth is 64.5 years and population density is 100.7 inhabitants per square kilometer.
The population growth rate of Kenya peaked in 1965, reaching around 4.05% annually, but has since declined to approximately 1.95% in 2026. The annual increase in the number of people has also decreased from a peak of around 1.18 million in 2008 to nearly 1.14 million in 2026.
In Kenya, life expectancy at birth has been increasing, with the indicator rising from 58.2 years in 2006 to 64.5 years in 2026, representing an increase of more than 6 years over the past 2 decades.
Kenya has several cities considered medium-sized by their number of inhabitants, but there are also some large ones. The most populous city is Nairobi, Nairobi County, con una diferencia significativa sobre las demás, alcanzando approximately 4.4 million inhabitants. It is followed by Kakamega, Kakamega County with 1.9 million and Mombasa, Mombasa County with 1.2 million.
These are the 20 most populous cities in Kenya:
| # | City | Population |
|---|---|---|
| 1 | Nairobi, Nairobi County | 4,397,073 |
| 2 | Kakamega, Kakamega County | 1,867,579 |
| 3 | Mombasa, Mombasa County | 1,208,333 |
| 4 | Nakuru, Nakuru County | 570,674 |
| 5 | Ruiru, Kiambu County | 490,120 |
| 6 | Eldoret, Uasin Gishu County | 475,716 |
| 7 | Kisumu, Kisumu County | 397,957 |
| 8 | Kikuyu, Kiambu County | 323,881 |
| 9 | Thika, Nairobi County | 251,407 |
| 10 | Naivasha, Nakuru County | 198,444 |
| # | City | Population |
|---|---|---|
| 11 | Karuri, Kiambu County | 194,342 |
| 12 | Karuri, Murang'A | 194,342 |
| 13 | Matuga, Kwale County | 194,252 |
| 14 | Mwala, Machakos County | 181,896 |
| 15 | Lang'ata, Nairobi County | 172,569 |
| 16 | Ongata Rongai, Kajiado County | 172,569 |
| 17 | Jomvu, Mombasa County | 163,415 |
| 18 | Garissa, Garissa County | 163,399 |
| 19 | Kitale, Trans Nzoia | 162,174 |
| 20 | Limuru, Kiambu County | 159,314 |