County Regions
Nyanza Region
Nyanza region which ranked third has six counties. Three of these; Kisii, Migori and HomaBay appeared in the top twenty ranking. The average index was 55.4%.
2015
| RANK | COUNTY | POPULATION CENSUS 2009 | COUNTYTRAK PERFORMANCE INDEX |
| 1 | KISII | 1,152,282 | 58.3% |
| 2 | MIGORI | 917,170 | 56.2% |
| 3 | HOMABAY | 963,794 | 56.1% |
| 4 | SIAYA | 842,304 | 55.3% |
| 5 | KISUMU | 968,909 | 54.8% |
| 6 | NYAMIRA | 598,252 | 51.5% |
| 5,442,711 | 55.4% | ||
2020
| RANK | COUNTY | POPULATION CENSUS 2019 | COUNTYTRAK PERFORMANCE INDEX |
| 1 | KISUMU | 1,155,574 | 53.4% |
| 2 | MIGORI | 1,116,436 | 48.6% |
| 3 | KISII | 1,266,860 | 48.1% |
| 4 | SIAYA | 993,183 | 45.8% |
| 5 | HOMA BAY | 1,131,950 | 43.7% |
| 6 | NYAMIRA | 605,576 | 43.6% |
| 6,269,579 | 47.20% | ||
Kisii County (2020)
| Governor | ONGWAE JAMES ELVIS OMARIBA |
| Senator | ONGERI SAMSON KEGENGO |
| Women Representative | ONGERA JANET |
Migori County
| Governor | OBADO ZAKARIA OKOTH |
| Senator | MBOGO GEORGE OCHILO AYACKO |
| Women Representative | OCHIENG PAMELA AWUOR |
Homa Bay County
| Governor | AWITI CYPRIAN ARCHELIUS OTIENO |
| Senator | KAJWANG MOSES OTIENO |
| Women Representative | WANGA GLADYS ATIENO NYASUNA |
Siaya County
| Governor | AMOTH CORNEL RASANGA |
| Senator | ORENGO JAMES AGGREY BOB |
| Women Representative | ODUOR OMBAKA CHRISTINE |
Kisumu County
| Governor | NYONG’O PETER ANYANG’ |
| Senator | OUTA FREDRICK OTIENO |
| Women Representative | BUYU ROZAAH AKINYI |
Nyamira County
| Governor | NYAGARAMA JOHN OBIERO |
| Senator | MOGENI ERICK OKONGO |
| Women Representative | MOMANYI JERUSHA MONGINA |
Kisii County
| Governor | H.E Simba Arati |
| Senator | Hon. Richard Onyoka |
| Women Representative | Aburi Donya Dorice |
Migori County
| Governor | H.E Ochillo Ayacko |
| Senator | Hon. Eddy Oketch |
| Women Representative | Mohammed, Fatuma Zainabu |
Homa Bay County
| Governor | H.E. Gladys Wanga |
| Senator | Hon. Moses Otieno Kajwang’ |
| Women Representative | Osogo Bensuda Joyce Atieno |
Siaya County
| Governor | H.E James Orengo |
| Senator | Hon. Oburu Oginga |
| Women Representative | Oduor Christine Ombaka |
Kisumu County
| Governor | H.E Prof. Peter Anyang’ Nyong’o EGH |
| Senator | Hon. Prof. Tom Ojienda |
| Women Representative | Ruth Adhiambo Odinga |
Nyamira County
| Governor | H.E Amos Nyaribo |
| Senator | Hon. Erick Okongo Mogeni |
| Women Representative | Mongina Jerusha Momanyi |