In Kenya, extra county schools fall in the second tier after national schools. In recent years, cases have emerged where extra county schools perform better than national school. Kanga High School and Moi Girls Nyabohanse are the national schools in Migori county. Extra county secondary schools in Migori county are grouped into three clusters; cluster one(C1), cluster two(C2) and cluster three (C3). Kadika Girls’ Secondary School, Migori Secondary School, Kanyawanga Secondary School among other schools form cluster one schools in Migori county.
Here is a list of best performing Extra County schools in Migori County
| S/N | SCHOOL CODE | SCHOOL NAME | TYPE | CLUSTER |
| 1. | 44707102 | Migori Secondary School | Boys | C1 |
| 2. | 44707105 | Kadika Girls’ Secondary School | Girls | C1 |
| 3. | 44707106 | Nyabisawa Girls Secondary School | Girls | C1 |
| 4. | 44708101 | Tarang’anya Boys High School | Boys | C1 |
| 5. | 44717101 | Kanyawanga Secondary School | Boys | C1 |
| 6. | 44717102 | Koderobara Secondary School | Boys | C1 |
| 7. | 44729104 | Sori Secondary School | Boys | C1 |
| 8. | 44736101 | St Joseph’s Rapogi Secondary School | Boys | C1 |
| 9. | 44736203 | St. Pius Uriri High School | Boys | C1 |
| 10. | 44739104 | St. Albert’s Girls High School, Ulanda | Girls | C1 |
| 11. | 44748016 | Isibania Boys Secondary School | Boys | C1 |
| 12. | 44708102 | Ikerege Mixed Secondary School | Mixed | C2 |
| 13. | 44717107 | Oyugi Ogango Girls’ Secondary School | Girls | C2 |
| 14. | 44717108 | Kangeso Secondary School | Boy | C2 |
| 15. | 44729106 | Bande Girls Secondary School | Girls | C2 |
| 16. | 44736201 | Bware Secondary School | Mixed | C2 |
| 17. | 44739201 | St. Mary Gorrety’s Dede Girls Secondary School | Girls | C2 |
| 18. | 44744102 | Moi Suba Girls Secondary School | Girls | C2 |
| 19. | 44748004 | St Mary’s Mabera Girls Secondary School | Girls | C2 |
| 20. | 44718202 | Nyaroha Girls Secondary School | Girls | C3 |
| 21. | 44739103 | Pe-Hill High School | Boys | C3 |
| 22. | 44744101 | St Peter’s Abwao Secondary School | Boys | C3 |