Former Code County Area (km2) Province 1 Mombasa Coast 213 2 Kwale Coast 8,270 3 Kilifi Coast 12,246 4 Tana River Coast 35,376 5 Lamu Coast 6,498 6 Taita–Taveta Coast 17,084 7 Garissa North Eastern 45,720 8 Wajir North Eastern 55,841 9 Mandera North Eastern 25,798 10 Marsabit Eastern 66,923 11 Isiolo Eastern 25,336 12 Meru Eastern 6,930 13 Tharaka-Nithi Eastern 2,410 14 Embu Eastern 2,556 15 Kitui Eastern 24,385 16 Machakos Eastern 5,953 17 Makueni Eastern 8,009 18 Nyandarua Central 3,108 19 Nyeri Central 2,361 20 Kirinyaga Central 1,205 21 Murang'a Central 2,326 22 Kiambu Central 2,449 23 Turkana Rift Valley 71,598 24 West Pokot Rift Valley 8,418 25 Samburu Rift Valley 20,183 26 Trans-Nzoia Rift Valley 2,470 27 Uasin Gishu Rift Valley 2,955 Elgeyo- 28 Rift Valley 3,050 Marakwet 29 Nandi Rift Valley 2,885 30 Baringo Rift Valley 11,075 31 Laikipia Rift Valley 8,696 32 Nakuru Rift Valley 7,510 33 Narok Rift Valley 17,921 34 Kajiado Rift Valley 21,293 35 Kericho Rift Valley 2,455 36 Bomet Rift Valley 1,998 37 Kakamega Western 3,034 38 Vihiga Western 531 39 Bungoma Western 2,207 40 Busia Western 1,628 41 Siaya Nyanza 2,496 42 Kisumu Nyanza 2,010 43 Homa Bay Nyanza 3,155 44 Migori Nyanza 2,586 45 Kisii Nyanza 1,318 46 Nyamira Nyanza 913 47 Nairobi Nairobi 695 TOTAL 581,309 Population(200 Capital 9 census) 939,370 Mombasa 649,931 Kwale 1,109,735 Kilifi 240,075 Hola 101,539 Lamu 284,657 Mwatate 623,060 Garissa 661,941 Wajir 1,025,756 Mandera 291,166 Marsabit 143,294 Isiolo 1,356,301 Meru 365,330 Chuka 516,212 Embu 1,012,709 Kitui 1,098,584 Machakos 884,527 Wote 596,268 Ol Kalou 693,558 Nyeri Kerugoya / 528,054 Kutus 942,581 Murang'a 1,623,282 Kiambu 855,399 Lodwar 512,690 Kapenguria 223,947 Maralal 818,757 Kitale 894,179 Eldoret 369,998 Iten 752,965 Kapsabet 555,561 Kabarnet 399,227 Rumuruti 1,603,325 Nakuru 850,920 Narok 687,312 Kajiado 752,396 Kericho 730,129 Bomet 1,660,651 Kakamega 554,622 Vihiga 1,375,063 Bungoma 743,946 Busia 842,304 Siaya 968,909 Kisumu(City) 963,794 Homa Bay 917,170 Migori 1,152,282 Kisii 598,252 Nyamira 3,138,369 Nairobi (City) 38,610,097 COUNTY GOVERNMENT CODES

s/no Code County

1 06-001 Mombasa 2 06-002 Kwale 3 06-003 Kilifi 4 06-004 Tana River 5 06-005 Lamu 6 06-006 Taita–Taveta 7 06-007 Garissa 8 06-008 Wajir 9 06-009 Mandera 10 06-010 Marsabit 11 06-011 Isiolo 12 06-012 Meru 13 06-013 Tharaka-Nithi 14 06-014 Embu 15 06-015 Kitui 16 06-016 Machakos 17 06-017 Makueni 18 06-018 Nyandarua 19 06-019 Nyeri 20 06-020 Kirinyaga 21 06-021 Murang'a 22 06-022 Kiambu 23 06-023 Turkana 24 06-024 West Pokot 25 06-025 Samburu 26 06-026 Trans-Nzoia 27 06-027 Uasin Gishu 28 06-028 Elgeyo-Marakwet 29 06-029 Nandi 30 06-030 Baringo 31 06-031 Laikipia 32 06-032 Nakuru 33 06-033 Narok 34 06-034 Kajiado 35 06-035 Kericho 36 06-036 Bomet 37 06-037 Kakamega 38 06-038 Vihiga 39 06-039 Bungoma 40 06-040 Busia 41 06-041 Siaya 42 06-042 Kisumu 43 06-043 Homa Bay 44 06-044 Migori 45 06-045 Kisii 46 06-046 Nyamira 47 06-047 Nairobi