List of Counties in Kenya. With the Promulgation of the Kenyan Constitution in 2010 came the Devolution system of Governmenr which brought about Devolution. Kenya has 47 Counties which are headed by Governors with Senators being incharge of oversight. Each County has County Assemblies which are are Represented by MCA’s{Members of County Assembly}
Here is a List of Counties in Kenya: Size an Economic Activities
1.MOMBASA COUNTY

List of Counties in Kenya : Mombasa County
Mombasa is the second largest city in the country. It has a population of about 939,370. With a population density of 4,292. It covers an area of 291 square kilometers. Mombasa has 4 constituencies which are Likoni , Changamwe, Mvita and Kisauni. Its headquarters are in Mombasa city. Its economy is mainly based on tourism, trade industrialization and transport.
2.KWALE COUNTY

List of Counties in Kenya : Kwale County
Kwale is located at the southern tip of the country. It borders Mombasa and kilifi to the north, Tanzania to the south Indian ocean to the east. Kwale county holds a population of about 649,931 with a population density of 79. It covers an area of 8,27 square kilometers. Kwale has the constituencies which are Kinago, Matuga and Msambweni. Kwale county headquarters is Ktown. It economy is mostly based on tourism, agriculture and fishing.
3.KILIFI COUNTY

List of Counties in Kenya : Kilifi County
Kilifi County is made up of the former Malindi and kilifi districts it borders Mombasa, lamu, Kwale, Taita taveta and Tana River counties . It holds a population of about 1,109,735 people with a population density of 88. It covers an area of 1,2610square kilometers .Kilifi county has 5 constituencies which are Malindi ,Bahari,Kaloleni,Ganze and Magarini. Kilifi headquarter is Kilifi town. It economy is mostly based on tourism and agriculture.
4.TANA RIVER COUNTY

List of Counties in Kenya : Tana River County
Tana River County is the largest in the former coast province. It has a population of about 240 075 people with a population density of 6. It covers an area of 38437 square kilometer. Tana River has three constituencies which are Galole, Garsen and Bura. Tana River headquarters are located at Hola. Its main economic activities are agriculture and tourism.
5.LAMU COUNTY

List of Counties in Kenya : LAMU COUNTY
LAMU is located in the northern tip of the former coast province. It borders TANA river ,Garissa and Somalia. It holds a population of about 101 539 with a population density of 16. It covers an area of 6273 square kilometer. Lamu county has two countituencies which are Lamu east and Lamu west. The headquarters of Lamu county is Lamu town. Its economy is mostly based on tourism and transport.
6.TAITA TAVETA COUNTY

List of Counties in Kenya : TAITA TAVETA COUNTY
Taita taveta county is located in the southern part of the country. Taita taveta borders Kwale and Tanzania in the south, Kitui and Kilifi to the east,Kajiado and Makueni to the north. It holds a population of about 284,657,with a population density of 17. It covers an area of 17,084 square kilometers . the headquarters oftaita taveta is wundanyi. Taita taveta has 4 constituencies which are Voi, Mwatate , Taveta and Wundanyi. Its economy is mostly based on tourism and mining.
7.GARISSA COUNTY

List of Counties in Kenya : GARISSA COUNTY
Garissa county shares a common border with Kitui,Wajir, Lamu, Tana River and Somalia. It holds a population of about 623,060 with a population density of 14. It covers an area of 44,175 square kilometers. The headquarters of Garissa county is Garissa town. It has four constituencies which are Ijara, Fafi, Dujis and Ladgera. Its main economic activities are livestock, pastoralism and agriculture.
8.WAJIR COUNTY

List of Counties in Kenya : WAJIR COUNTY
Wajir county is located in the middle of the former north eastern province. It borders Somalia, Marsabit, Mandera and Isiolo. It has a population of about 661,941 with a population density of 12. It covers an area of 56,686 square kilometres. The headquarters of Wajir county is Wajir town. Wajir county has 4 constituencies which are Wajir north, Wajir south, Wajir east and Wajir west. Its economic activities are mostly livestock keeping and pastoralism.
9.MANDERA COUNTY

List of Counties in Kenya : MANDERA COUNTY
Mandera is located in the northern tip of Kenya boundary.it borders Ethiopia and Somalia. It has a population of about 1,025,756 with a population density of 39. It covers an area of 25,991sqaure kilometers .The headquarters of mandera county is Mandera town. Mandera has three constituencies Mandera central, Mandera west and Mandera east. Its economy is mainly pastrolism, livestock keeping and trade.
10.MARSABIT COUNTY

List of Counties in Kenya : MARSABIT COUNTY
Marsabit county is situated in the northern tip of the former eastern province. Marsabit county is the largest county in the country. It has a population of 291,166 with a population density of 4 it covers an area of 70,961.square kilometers. The headquarters of marsabit county is marsabit town. Marsabit county has 5 constituencies which are El-moro, Borana, Burji, gabra, Rendille and Turkana.
11.ISIOLO COUNTY

List of Counties in Kenya : ISIOLO COUNTY
Isiolo county borders ,Laikipia ,Marsabit ,Meru ,Tana river ,Samburu ,Garissa ,Mandera and Wajir. It has a population of about 143 294 with population density of 6. The headquaters of Isiolo is isolo town. Isiolo county has 2 constituencies Isiolo south and Isiolo north.it covers an area of 25, 336square kilometers. Its economy is mostly pastrolism and cattle trading.
12. MERU COUNTY

List of Counties in Kenya : Meru County
Meru is mostly known for its aproximity to MT Kenya, it has a population of about 1,356,301 with a population density of 196. The headquaters of Meru county is Meru town. Meru county has7 constituencies North Imenti , Tigania west , Central imenti, Igebe , Tigania east,and South Imenti.it covers an area of about 6,933 square kilometers. Its economy is mostly tourism and agriculture.
13.THARAKA- NITHI COUNTY

List of Counties in Kenya : Tharaka Nithi County
Tharaka-nithi borders meru town to the south. It has a population about 365,330 with a population density of 138.the headquaters of tharaka-nithi is chukka. Thaaka-Nithi has 2 constituencies Tharaka and Nithi. It covers an area of about 2,639 square kilometers. Its economy is mostly pastrolism and agriculture.
14.EMBU COUNTY

List of Counties in Kenya : Embu County
Embu county is located in the middle of the former eastern province. It has a population of about 516,212 with a population density of183. It covers an area of 2,818 square kilometers. The headquaters of embu county is Embu town . Embu county has 4 constituencies which are Siakago, Manyatta, Gachoka and Runyenges. Its economy mostly agriculture.
15.KITUI COUNTY

List of Counties in Kenya : Kitui County
Kitui county borders machakos county to the east it has a population of about 1,012,709 with a population density of 33. It covers an area of 30,497 square kilometers . the headquarters Kitui county is kitui town . it has 6 constituences which are Mutomo , Mutito, Kitui east , Kitui west, Mwingi south, Mwingi north. Its main economic activities are mining and industrialization
16.MACHAKOS COUNTY

List of Counties in Kenya : Machakos County
Machakos county is situated in the lower part of the former eastern province .i has a population of about 1,098,584 with a population density of 177.it covers an area of 6,201 square kilometers . headquaters of machakos county is machakos town . It has 6 constituencies which are Kathiani, Kangundo, Masinga, Vatta, Mwala, and Machakos town. Its main economic activities are tourism, information communication technology and industrialization.
17.MAKUENI COUNTY

List of Counties in Kenya : Makueni County
Makueni county is situated in the former eastern province. It has a population of about 884,527with a population density of 110. it covers an area of 8009 square kilometers. The headquarters of Makueni County is wote.it has 5 constituencies which are Mbooni, Kilome, Kibwezi, Kaiti, and Makueni.
18.NYANDARUA COUNTY

List of Counties in Kenya : Nyandarua County
Nyandarua county is located in the north east part of the former central province. It has a population of about 596,268 with a population density of184. It covers an area of 3,245square kilometers. The headquarters of nyandarua county is ol kalou. It has 4 constituencies which are Ndaragua, Kipipiri , Olkalou, Kinangop. It’s main economic is agriculture.
19.NYERI COUNTY

List of Counties in Kenya : Nyeri County
Nyeri county is located in the northern tip of central Kenya. It borders meru kirinyanga, laikipia, muranga and nyandarua.it has a population of about 693,558 with a population density of 208. It covers an area of 3,337square kilometers. Nyeri county headquarters is nyeri town. Nyeri town has 6 constituencies which are mukurweine, nyeri town, kieni, othaya, mathira and tetu.The main economic activities in Nyeri County are agriculture, livestock keeping, quarrying and tourism.
20.KIRINYAGA COUNTY

List of Counties in Kenya :KIRINYAGA COUNTY
Kirinyaga county borders muranga, nyeri,embu and meru it has a population of about 528,054 with a population density of 357 it covers an area of1,479square kilometers. Kirinyaga county headquarters is Kerugoya. Kirinyaga County has 4 constituencies which are mwea, kirinyaga, githugu and ndia. Its main economic activities are agriculture infrastructure.
21.MURANGA COUNTY

List of Counties in Kenya : MURANGA COUNTY
It is located in the heart of central Kenya it has a population of about 942,581with a population density of 368.it covers an area of 2,559 square kilometers. Muranga county headquarters is muranga town it has 7 constituencies which are kigumo, kandara, gatanga, mathiyo, kangema, kiharu maragwaThe main economic activities are agriculture and trade.
22.KIAMBU COUNTY

List of Counties in Kenya: Kiambu County
It is among the largest counties in Kenya it has a population of about 1,623,282 with a population density of 638.it covers an area of2, 543square kilometers. Kiambu county headquarters are in kiambu town. It has 7 constituencies which are juja, lari, gatundu south, gatundu north, kiambaa limuru. Main economic activities are industrialization and infrastructure.
24.TURKANA COUNTY

List of Counties in Kenya: TURKANA COUNTY
Turkana County is located in the former Rift valley province. It shares a border with Marsabit, Samburu, West Pokot, Baringo, Uganda, and Ethiopia. It has a population of about 855,399 with a population density of 12. It covers an area 68,680 square kilometers. The headquarters of Turkana County is Lodwar. It has three constituencies which are Turkana south, Turkana north and Turkana central. The main economic activities are livestock keeping, trade, Pastoralism, tourism and fishing.
25.WEST POKOT

List of Counties in Kenya: West Pokot
West Pokot County has population of 512,690 with a population density of 56. It covers an area of 9,169square kilometers. The headquarters of west Pokot County is Kapenguria. It has 4 constituencies which are south Pokot, Sigor, Kapenguria and Kacheriba. The main economic activities are agriculture, pastoral-ism, and livestock keeping
LIST OF THE LEADERS INCHARGE OF COUNTIES IN KENYA
26.TRANS NZOIA COUNTY

List of Counties in Kenya:Trans-Nzoia County
Trans Nzoia County has a population of about 818,757with a population density of 328. It covers an area of 2496 square kilometers. The headquarters of Trans Nzoia is Kitale. It has 4 Constituencies which are Kiminini, Kwanza, Saboti, Endebess . The economy is farming based.
27.UASIN GISHU

List of Counties in Kenya: Uasin Gishu
Uasin Gishu County has a population of about 894179 with a population density of 267. It covers an area of 3345 square kilometers. The headquarters of Uasin Gishu is Eldoret. It has three constituencies which are Eldoret south, Eldoret north and Eldoret east. The main economic activities are agriculture, livestock keeping and sports.
28.Vihiga County
Vihiga County has a population of about 554622 with a population density of 983. It covers an area of 564 square kilometers. Vihida county headquarters are in Vihiga town. It has 5 constituencies which are Sambatia, Hamisi, Vihiga, Emuhaya and Luanda. Its main economic activities are farming and trade.
29.NAKURU COUNTY
Nakuru County has a population of about 1603325 with a population density of 214. It covers an area of 7495 square kilometer. Its headquarters are in Nakuru town. It has 11 constituencies which are Molo, Nakuru town east, Njoro, Kuresoi north, Naivasha, sumbukia, Gilgil, Kuresoi south, Rongai, Nakuru town west and bahati. Its main economic activities are agriculture, trade, industrialization and tourism.
30.NANDI COUNTY
Nandi County has a population of about 752,965with a population density of 261. It covers an area of 2884square kilometers. Its headquarters are in Kapsabet it has 5 constituencies which are Mosop, Tinderet, Emgwen, Aidai and Nandi hills. Its main economic activities are agriculture and sports.
31.SAMBURU COUNTY
Samburu County has a population of about 223947 with a population density of 11.It covers an area of 21022 square kilometers. It headquarters are at Maralal. It has three constituencies which are Samburu north, Samburu east and Samburu west. Its main economic activities are livestock keeping, agriculture and pastoralism.
32.SIAYA COUNTY
Siaya County has a population of about 842364 with a population density of 333. Its headquarters are at Siaya town. It covers an area of 2530 square kilometers. It has 5 constituencies which are Ugenya, Rarienda, Ugunja, Bondo and Alego Usonga. Its main economic activities are farming, fishing and industries.
33.NAROK COUNTY
Narok County has a population of about 850920 with a population density of 48. It covers an area of 17933 square kilometers. Its headquarters are at Narok town. It has five constituencies which are Kajiado west, Kilgoris, Narok north, Kajiado east and Emurua Dikirr. Its main economic activities are farming, livestock keeping and tourism.
34.NYAMIRA COUNTY
Nyamira County has a population of about 598252 with a population density 665. It covers an area of 899 square kilometers. Its headquarters are in Nyamira town. It has 3 constituencies which are Kitutu Masaba, West Mugirango and North Mugirango. Its main economic activity is agriculture.
35.MIGORI COUNTY
Migori County has a population of about 917170 with a population density of 353. It covers an area of 2596 square kilometers. Its headquarters are at Migori town. It has 8 constituencies which are Kuria East, Kuria west, Rongo, Awendo, Nyatike, Uriri, Migori east and Migori west. Its main economic activities are agriculture, mining and industrialization.
36.NAIROBI COUNTY
It is the capital city of Kenya. It has a population of about 3138369 with a population density of 4515. It covers an area of 695 square kilometers. Its headquarters are at city hall. It has 17 constituencies. Its main economic activities are information and communication technology, industrialization and tourism.
37.KISUMU COUNTY
Kisumu County has a population of about 968909 with a population density of 465. It covers an area of 2086 square kilometer. Its headquarters are at Kisumu city. It has 7 constituencies which are Kisumu east, Nyakach, Muhoroni, Nyando, Seme, Kisumu central and Kisumu west. Its main economic activities are fishing and agriculture.
38.LAIKIPIA County
Laikipia County has a population of about 399227 with a population density of 42. It covers an area of 9462 square kilometers. Its headquarters are in Nanyuki. It has 3 constituencies which are Lakipia North, Laikipia East and Laikipia West. Its main economic activities are livestock keeping, tourism and agriculture.
39.KISII COUNTY
Kisii County has a population of about 1152282 with a population density of 875. It covers an area of 1318 square kilometers. Its headquarters are at Kisii town. It has 10 constituencies. Its main economic activities are industrialization and agriculture.
40.KAJIADO COUNTY
Kajiado County has a population of about 687312 with a population density of 31. It covers an area of 2190 square kilometers. Its headquarters are at Kajiado town. It has three constituencies. Ifs main economic activities are tourism and livestock.
41.ELGEYO MARAKWET
Elgeyo Marakwet has a population of about 369998 with a population density of 122. It covers an area of 3030 square kilometers. Its headquarters are at Iten. It has 4 constituencies .Its economic activities are agriculture and livestock keeping.
42.BOMET COUNTY
Bomet County has a population of about 891835 with a population density of 319. It covers an area of 2792 square kilometers. Its headquarters are at Bomet town. It has 5 constituencies. Its economic activities are livestock and agriculture.
43.KERICHO COUNTY
Kericho County has a population of about 590690 with a population density of 274. It covers an area of 2158 square kilometers. It headquarters are at Kericho town. It has three constituencies. Its economic activities are agriculture and livestock.
44.BUNGOMA COUNTY
Bungoma County has a population density of about 1375063 with a population density of 453. It covers an area of 3032b square kilometers. Its headquarters are in Bungoma town. It has 9 constituencies. Its main economic are agriculture and industrialization.
45.KAKAMEGA COUNTY
It has a population of about 16600651 with a population density of 550. It covers an area of 3018 square kilometer. Its headquarters are at Kakamega town.it has 12 constituencies. Its main economic activities are industries and tourism
46.BUSIA COUNTY
Busia County has a population 743946 of about with a population density of 439. It covers an area of 1695 square kilometer. Its headquarters are at Busia town. It has seven constituencies. Its economic activities are agriculture, fishing and trade.
47.HOMABAY
Homabay has a population of about 963794 with a population density of 303. It covers an area of 3183 square kilometers. Its headquarters is at Homabay town, it has 8 constituencies. Its main economic activities are fishing, farming and manufacturing.