Kisumu (kiːˈsuːmuː ) is the third-largest city in Kenya after the capital, Nairobi, and Mombasa. It is the second-largest city after Kampala in the Lake Victoria Basin. The city has a population of slightly over 600,000. The metro region, including Maseno and Ahero has a population of 1,155,574 people (560,942 males, 594,609 females and 23 intersex) according to the 2019 Kenya Population and Housing census which was conducted by the Kenya national Bureau of Statistics.
Apart from being an important political city, it is one of the premier industrial and commercial centres in Kenya. It is also an intellectual city with many PhDs per capita. The city is currently undergoing an urban rejuvenation of the downtown and lower town which includes modernizing the lake front, decongesting main streets, and making the streets pedestrian-friendly.
Culturally, Kisumu serves as the centre of the Luo people of East Africa. It was the most prominent urban centre in the pre-colonial, post-colonial, and modern eras for natives of the Kavirondo region. It was briefly renamed Port Florence, before its name was reverted back.
The city serves as the capital of Kisumu County and was the immediate former capital of now-defunct Nyanza Province.
It is an important link in the trade route between Lake Victoria and Mombasa because of its water and rail connections. It is also the chief terminus for the agricultural produce of Nyanza and Western regions. Kisumu International Airport has regular flights to Nairobi and other neighbouring cities such as Mombasa. According to the United Nations, Kisumu is now recognized as a key city and a "Millennium City" – the first of its kind in the world and also in East Africa.
Its elevation is above sea level. Kisumu is about northwest of Nairobi and is located on the shores of Lake Victoria. It lies at the northeastern edge of the Winam Gulf, a long, shallow arm that protrudes from the main body of Lake Victoria. Kisumu is south of the equator and has, due to its elevation, moderate temperatures.