Kajiado County is located in the Southern part of Kenya. It borders Nairobi County to the North East, Narok County to the West, Nakuru and Kiambu Counties to the North, Taita Taveta County to the South East, Machakos and Makueni Counties to the North East and East respectively, and the Republic of Tanzania to the South.
Baringo County is situated in the Rift Valley Region and shares borders with 8 counties namely, West Pokot to the North West, Turkana to the North, Samburu to the North East, Laikipia to the East, Nakuru to the South, Kericho and Uasin-Gishu Counties to the South West, and Elgeyo-Marakwet to the West.
Located on the equator, Laikipia County is found in the Great Rift Valley and is among the smallest in Kenya with an area of 9,462 Km2. The county borders six counties, Meru and Nyeri to the South East, Nyandarua to the South West, Samburu to the North, Isiolo to the North East and Baringo to the west.
Nairobi County is located within the Greater Nairobi Metropolitan region and is surrounded by Kiambu County to the North and West, Machakos County to the East, and Kajiado County to the South. The county is administratively divided into 17 sub-counties and 85 wards. According to the KPHC, 2009 results, the county population was 3,138,369 (51.1% males and 48.9% females).
Migori County is situated in the South-Western part of Kenya. It borders Homa Bay County to the North, Kisii and Narok Counties to the East and the Republic of Tanzania to the South. It also borders Lake Victoria to the West. It covers an area of 2,596.5 km2 including approximately 478 km2 of water surface.