Nairobi City County is one of the 47 counties of Kenya. With an estimated population of 5,454,000 in 2024, it is the third-smallest in area of the counties, yet the most populous one. It also serves as the capital of Kenya. The county entity was effected in 2013, replacing Nairobi City Council, which had been the long-standing unit of local administration since before Kenya's independence. The city county consists of eleven gazetted sub-counties and eighty-five electoral wards. On the national level, Nairobi also sends seventeen Members of Parliament across the constituencies and one County Woman Representative to the National Assembly; and one senator to the Senate. The county government, which is allotted devolved functions as stated in the Constitution of Kenya, is headed by the county governor, who appoints his cabinet. The county's legislature is headed by the County Speaker, who presides over the County Assembly. The Members of the County Assembly (MCAs) are elected from single-member districts and represent their respective electoral wards. Additional MCAs are also nominated by political parties as a form of affirmative action.