Nairobi City County

Nairobi City County
Nairobi City Hall
Location in Kenya
Coordinates: 1°17′00″S 36°49′00″E / 1.2833°S 36.8167°E / -1.2833; 36.8167
Country Kenya
Formed4 March 2013
CapitalNairobi
Sub-counties
Government
 • GovernorJohnson Arthur Sakaja
 • SenatorEdwin Sifuna
 • County Woman RepresentativeEsther Passaris
Area
 • Total
696.1 km2 (268.8 sq mi)
 • Rank45th
Elevation
1,795 m (5,889 ft)
Population
 (2019)
 • Total
4,397,073
 • Rank1st
 • Density6,317/km2 (16,360/sq mi)
Time zoneUTC+03:00 (EAT)
HDI (2019)0.681
GCP (2023)27.5% of Kenya's GDP
Websitenairobi.go.ke

Nairobi City County is one of the 47 Counties of Kenya and serves as the capital of Kenya. It is the most populous county as of the 2019 census with a population of 4,397,073, yet among the smallest in area at 696.1 km². Despite its small size, Nairobi County contributes approximately 27.5% of Kenya's Gross Domestic Product, making it the economic powerhouse of the nation.

The county was established on 4 March 2013 under Kenya's new constitution, replacing the former Nairobi Province administrative unit. It comprises 17 constituencies and 85 electoral wards, with 11 gazetted sub-counties for administrative purposes.