| School Name | Sub-County | School Level | |
|---|---|---|---|
| 1 | Aremiet Mixed Secondary School | Isiolo | Secondary |
| 2 | Bulampya Day Secondary School | Isiolo | Secondary |
| 3 | Elsa Secondary School | Isiolo | Secondary |
| 4 | Isiolo Barracks Secondary School | Isiolo | Secondary |
| 5 | Isiolo Boys Secondary School | Isiolo | Secondary |
| 6 | Isiolo Girls' High School | Isiolo | Secondary |
| 7 | Kambi Garba Mixed | Isiolo | Secondary |
| 8 | Kipsing Secondary School | Isiolo | Secondary |
| 9 | Kisima 78 Mixed | Isiolo | Secondary |
| 10 | Leparua Mixed Day Secondary School | Isiolo | Secondary |
| 11 | Mwangaza Girls Day | Isiolo | Secondary |
| 12 | Ngaremara Girls Secondary School | Isiolo | Secondary |
| 13 | Ngaremara Secondary School | Isiolo | Secondary |
| 14 | Oldonyiro Girls Secondary School | Isiolo | Secondary |
| 15 | Oldonyiro Secondary School School | Isiolo | Secondary |
| 16 | St Pauls Kiwanjani | Isiolo | Secondary |
| 17 | Uhuru Mixed Secondary School | Isiolo | Secondary |
| 18 | Waso Secondary School | Isiolo | Secondary |
| Primary Schools in Isiolo Sub County |
| List of Public Primary Schools in Isiolo |
| List of Private Primary Schools in Isiolo |
| Junior Secondary Schools (JSS) in Isiolo Sub County |
| List of Public JSS Schools in Isiolo |
| List of Private JSS Schools in Isiolo |
| High Schools in Isiolo Sub County |
| List of Public High Schools in Isiolo |
| List of Private High Schools in Isiolo |