coastal city of Mombasa. It has a population of 1,155,574 (according to the 2019 National Census). The land area of Kisumu County totals 2085.9 km².

Kisumu County's neighbours are Siaya County to the West, Vihiga County to the North, Nandi County to the North East and Kericho County to the East. Its neighbour to the South is Nyamira County