The current metro area population of Nairobi in 2025 is 5,767,000, a 4.08% increase from 2024.

• The metro area population of Nairobi in 2024 was 5,541,000, a 4.06% increase from 2023.
• The metro area population of Nairobi in 2023 was 5,325,000, a 4.02% increase from 2022.
• The metro area population of Nairobi in 2022 was 5,119,000, a 4% increase from 2021.