Kitui County is a county in the former Eastern Province of Kenya. Its capital and largest town is Kitui, although Mwingi is also another major urban centre. The county has a population of 1,012,709 (2009 census. and an area of 24,385.1 km².
The name Kitui means ‘a place where iron goods are made’. The Kamba iron-smiths who settled in the county many years before the colonial period are the ones who named the area Kitui.