Machakos County is a county of Kenya. Its capital is Machakos. Its largest town is Machakos, the country's first administrative headquarters. The county has a population of 1,098,584. The county borders Nairobi and Kiambu counties to the West, Embu to the North, Kitui to the East, Makueni to the South, Kajiado to the South West, and Muranga and Kirinyaga to the North West.