Senior Schools in Isiolo County: Full List by Cluster and Sub-County

The Ministry of Education’s senior schools list (June 2025) names 32 public senior schools in Isiolo County, across 6 sub-counties. Isiolo has the most, with 15, while Sericho has the fewest at 2. Compared with many counties, Isiolo leans towards boarding: 14 of its 32 schools (44%) take boarders, and only 18 are C4 day schools.

Its 2 C1 national schools: Garbatula High School and Isiolo Girls High School. By cluster the county has 2 C1, 2 C2, 10 C3 and 18 C4 schools. 22 are mixed, 6 are girls’ schools and 4 are boys’ schools.

Senior Schools in Isiolo by Sub-County

Practical Tips for Isiolo Families

• 4 of Isiolo’s sub-counties (Cherab, Merti, Oldonyiro, Sericho) have no C1 or C2 school, so families there who want those clusters will be looking at boarding schools in other sub-counties or counties.
• Among C1 and C2 schools here, 1 are girls-only and 2 are boys-only. Boys have more single-sex choices at this level than girls.
• If you want a mixed boarding school, the list has 7 in Isiolo, including Bisanadhi High School, Kulamawe Secondary School and Elsa Secondary School.
• 1 school in Isiolo is listed as integrated, taking learners with disabilities alongside others: Isiolo Girls High School.
• Isiolo has the most C4 day schools in Isiolo (10), so learners there have the widest choice of nearby day schools.
• With 18 C4 day schools, list your realistic nearby day school among the 12 choices as a safe option, especially in Isiolo, which has the widest choice.

How Grade 10 Selection Works for Isiolo Learners

Since 21 December 2025 the rule is 12 choices spread over C1, C2, C3 and C4. A Isiolo family might pick from the county’s 2 C1 and 2 C2 schools for the top slots, then fill the rest from its 10 C3 and 18 C4 options. The placement score is 60% KJSEA, 20% school-based assessment from Grades 7 and 8 and 20% KPSEA. Because a school can only place your child in a pathway it actually runs, and the list for Isiolo doesn’t record pathways, check with the school directly. Useful next steps: CBC pathways explained, the KJSEA grade calculator and our placement guide.

Fees at Isiolo Senior Schools

For the 56% of Isiolo schools that are day schools, parents pay no tuition under Gazette Notice 1449 of 2026. Boarding fees at the 14 boarding schools here fall under two caps: KSh 53,554 or KSh 40,535 a year. The notice does not name schools, so ask for the fee structure on letterhead. See senior school fees 2026.

Full List of Isiolo Senior Schools by Cluster

C1 (national) Schools in Isiolo (2)

C2 (extra-county type) Schools in Isiolo (2)

C3 (county type) Schools in Isiolo (10)

C4 (sub-county day) Schools in Isiolo (18)

Revising for KJSEA now? Our KJSEA revision guide and practice papers help Grade 9 learners prepare. Search all Isiolo schools in the school finder or go back to senior schools in Kenya.

Source: Ministry of Education, Senior Schools in Kenya (June 2025). Names tidied for readability.