Tharaka-Nithi and Meru to the north, Embu to the northwest, Machakos and Makueni to the west, Tana River to the east and southeast, and Taita-Taveta to the south.
Kitui County is located 170Km to the South East of Nairobi City. It covers an area of about 30,496 km2. Kitui County shares its borders with seven counties;
Tharaka-Nithi and Meru to the north, Embu to the northwest, Machakos and Makueni to the west, Tana River to the east and southeast, and Taita-Taveta to the south.