Nairobi (/naɪˈroʊbi/ ; [naɪˈroːbi]) is the capital and largest city of Kenya. It is famous for having the Nairobi National Park, the world’s only game reserve found within a major city. The city and its surrounding area also form Nairobi County, whose current governor is Evans Kidero.he town quickly grew to replace Machakos as the capital of Kenya in 1907. After independence in 1963, Nairobi became the capital of the Republic of Kenya. During Kenya's colonial period, the city became a centre for the colony's coffee, tea and sisal industry.