Size and population of Kenya Counties

List of counties

Under the new constitution, Kenya is now divided into 47 counties for administrative purposes. They are grouped below according to the former province of which they were part, with their areas and populations as of the 2009 census:^[5]

Code	County	Former Province	Area (km2)	Population Census (2009)	Capital
1	Mombasa (County)	Coast	212.5	939,370	Mombasa (City)
2	Kwale	Coast	8,270.3	649,931	Kwale
3	Kilifi	Coast	12,245.9	1,109,735	Kilifi
4	Tana River	Coast	35,375.8	240,075	Hola
5	Lamu	Coast	6,497.7	101,539	Lamu
6	Taita–Taveta	Coast	17,083.9	284,657	Mwatate
7	Garissa	North Eastern	45,720.2	623,060	Garissa
8	Wajir	North Eastern	55,840.6	661,941	Wajir
9	Mandera	North Eastern	25,797.7	1,025,756	Mandera
10	Marsabit	Eastern	66,923.1	291,166	Marsabit
11	Isiolo	Eastern	25,336.1	143,294	Isiolo
12	Meru	Eastern	6,930.1	1,356,301	Meru
13	Tharaka-Nithi	Eastern	2,409.5	365,330	Kathwana
14	Embu	Eastern	2,555.9	516,212	Embu
15	Kitui	Eastern	24,385.1	1,012,709	Kitui
16	Machakos	Eastern	5,952.9	1,098,584	Machakos
17	Makueni	Eastern	8,008.9	884,527	Wote
18	Nyandarua	Central	3,107.7	596,268	Ol Kalou
19	Nyeri	Central	2,361.0	693,558	Nyeri
20	Kirinyaga	Central	1,205.4	528,054	Kerugoya / Kutus
21	Murang'a	Central	2,325.8	942,581	Murang'a
22	Kiambu	Central	2,449.2	1,623,282	Kiambu
23	Turkana	Rift Valley	71,597.8	855,399	Lodwar
24	West Pokot	Rift Valley	8,418.2	512,690	Kapenguria
25	Samburu	Rift Valley	20,182.5	223,947	Maralal
27	Trans-Nzoia	Rift Valley	2,469.9	818,757	Kitale
26	Uasin Gishu	Rift Valley	2,955.3	894,179	Eldoret
28	Elgeyo-Marakwet	Rift Valley	3,049.7	369,998	Iten
29	Nandi	Rift Valley	2,884.5	752,965	Kapsabet
30	Baringo	Rift Valley	11,075.3	555,561	Kabarnet
31	Laikipia	Rift Valley	8,696.1	399,227	Nanyuki
32	Nakuru	Rift Valley	7,509.5	1,603,325	Nakuru
33	Narok	Rift Valley	17,921.2	850,920	Narok
34	Kajiado	Rift Valley	21,292.7	687,312	Kajiado
35	Kericho	Rift Valley	2,454.5	752,396	Kericho
36	Bomet	Rift Valley	1,997.9	730,129	Bomet
37	Kakamega	Western	3,033.8	1,660,651	Kakamega
38	Vihiga	Western	531.3	554,622	Vihiga
39	Bungoma	Western	2,206.9	1,375,063	Bungoma
40	Busia	Western	1,628.4	743,946	Busia
41	Siaya	Nyanza	2,496.1	842,304	Siaya
42	Kisumu	Nyanza	2,009.5	968,909	Kisumu(City)
43	Homa Bay	Nyanza	3,154.7	963,794	Homa Bay
44	Migori	Nyanza	2,586.4	917,170	Migori
45	Kisii	Nyanza	1,317.9	1,152,282	Kisii
46	Nyamira	Nyanza	912.5	598,252	Nyamira
47	Nairobi (County)	Nairobi (Province)	694.9	3,138,369	Nairobi (City)
			581,309.0	38,610,097	Nairobi