The Catholic Diocese of Kitui (Kitui county) borders the Catholic Archdiocese of Mombasa (Taita Taveta) to the South, the Catholic Diocese of Machakos (Makueni and Machakos Counties) to the west, the Catholic Diocese of Embu (Embu County),the Catholic Diocese of Meru (Tharaka), the Catholic Diocese of Isiolo (Isiolo County) to the North, and the Catholic Diocese of Garissa (Garissa and Tana River Counties) to the East.
