| 17306301 | OLDONYIRO SECONDARY SCHOOL | County | Mixed | Isiolo |
| 17322301 | SERICHO SECONDARY SCHOOL | County | Mixed | Isiolo |
| 17356101 | MERTI SECONDARY SCHOOL | County | Boys | Isiolo |
| 17356102 | MERTI MUSLIM GIRLS’ SECONDARY SCHOOL | County | Girls | Isiolo |
| 17356203 | BULESA SECONDARY SCHOOL | County | Mixed | Isiolo |
