Talking about extra county schools in Kisumu county. These are sub national schools that produce top students and have some of the best learning facilities. Extra county schools in Kisumu county such as Onjiko high is home to some top personalities in Kenya and even abroad including General Miguna Miguna and blogger Robert Alai.
Here is a list of all Extra County Secondary schools in Kisumu County
| S/N | SCHOOL CODE | SCHOOL NAME | TYPE | CLUSTER |
| 1. | 39713006 | Onjiko High School | Boys | C1 |
| 2. | 39733212 | Nyabondo High School | Boys | C1 |
| 3. | 39733213 | Nyakach Girls’ High School | Girls | C1 |
| 4. | 39733216 | Sigoti Complex Girls Secondary School | Girls | C1 |
| 5. | 39733307 | Thurdibuoro Mixed Secondary School | Mixed | C1 |
| 6. | 39734401 | Achego Girls Secondary School | Girls | C1 |
| 7. | 39734402 | Koru Girls Secondary School | Girls | C1 |
| 8. | 39737022 | Chulaimbo Secondary School | Boys | C1 |
| 9. | 39741005 | Kisumu Boys High School | Boys | C1 |
| 10. | 39713001 | Ahero Girls Secondary School | Girls | C2 |
| 11. | 39713021 | Otieno Oyoo Secondary School | Boys | C2 |
| 12. | 39714101 | Ngere High School | Boys | C2 |
| 13. | 39714106 | St. Barnabas Girls’ Secondary School | Girls | C2 |
| 14. | 39733108 | Ack Rae Girls High School | Girls | C2 |
| 15. | 39737025 | Sinyolo Girls Secondary School | Girls | C2 |
| 16. | 39713023 | Migingo Girls Secondary School | Girls | C3 |
| 17. | 39734312 | Miwani Secondary School | Boys | C3 |
| 18. | 39734408 | St. Stephen’s Menara Secondary School | Boys | C3 |
| 19. | 39741007 | St.Teresa’s Girls Secondary School | Girls | C3 |
