Nairobi County is home to some of Kenya's leading C1 senior schools under the Competency-Based Education (CBE) system.
These schools represent the highest category of public senior secondary institutions and are recognised for strong academic performance, well-developed infrastructure and diverse learning pathways.
Several of the schools were previously classified as National Schools, while others are specialised institutions that support learners with special educational needs.

C1 Senior Schools in Nairobi County
The following are the C1 senior schools in Nairobi County:
- Buruburu Girls Secondary School
- Kasarani Treeside School for the Deaf
- Kenya High School
- Lenana School
- Moi Forces Academy
- Moi Girls School Nairobi
- Nairobi School
- Pangani Girls High School
- Precious Blood Riruta
- St. George's Girls Secondary School
- Starehe Boys' Centre and School
- Starehe Girls' Centre
- State House Girls High School
About C1 Senior Schools
C1 schools are classified by the Ministry of Education as top-tier public senior secondary schools. They typically offer:
- Multiple academic and career pathways under the CBC curriculum.
- Modern learning facilities and laboratories.
- Co-curricular programmes including sports, leadership and clubs.
- Well-qualified teaching staff.
- Boarding and day school options, depending on the institution.
Students are placed in these schools through the Ministry of Education's senior school placement process based on the applicable placement criteria.
Choosing a C1 Senior School
When selecting a school, learners and parents should consider:
- Available CBC pathways and subject combinations.
- School location.
- Boarding or day school options.
- Co-curricular activities.
- Available facilities and student support services.
These factors can help students choose a school that aligns with their academic interests, career goals and personal needs.