Osieko Senior School (formerly called Osieko Secondary School) is a C4 Public Mixed Senior School that is physically located in Busia County, Bunyala Sub County in the Western Region of the Republic of Kenya. This article provides all the details about Osieko Senior School, including: the school’s cluster, level, UIC Code, Knec Code, Admissions and location.
This Day Senior School forms part of the Busia Education Network and has fully transitioned to a Senior School that offers Competency Based Education (CBE) Curriculum to Grade 10, 11 and 12 Learners.
Osieko Senior School School’s Basic Data and National Information.
| School’s Old Name | Osieko Secondary School |
| School’s New Name | Osieko Senior School |
| Cluster | C4 |
| Gender | Mixed |
| Accomodation Type | Day |
| Region | Western |
| County | Busia |
| Sub County | Bunyala |
| UIC Code | 6LLJ |
| KNEC Code | 35610105 |
| Type of School | Public |
| Regular or SNE | Regular |
| Disability Type | None |
Osieko Senior School operates as a fully Senior School offering the Competency Based Education (CBE/CBC) Curriculum. Students transition to this school from Junior School after sitting for the Kenya Junior School Education Assessment (KJSEA); which is a national assessment for Grade 9 learners under the Competency-Based Curriculum (CBC/ CBE). It assesses students in nine learning areas to evaluate their readiness to transition into Senior School.
Students who join Osieko Senior School at grade 10 specialize in any one of the following three main CBE pathways:
- STEM (Science, Technology, Engineering, and Mathematics): Focuses on innovators and problem-solvers. It branches into Pure Sciences, Applied Sciences, and Technical Studies, leading to careers like medicine, engineering, and IT.
- Social Sciences: Designed for communicators and leaders. It includes tracks in Languages, Literature, Humanities, and Business Studies, preparing students for fields like law, journalism, and education.
- Arts & Sports Science: For creative minds and athletes. It features tracks in Visual Arts, Performing Arts, Music, and various sports disciplines, fostering careers in the creative and sports industries.
Osieko Senior School’s Background and History.
Osieko Senior School, historically known as Osieko Secondary School, has played a very key role in the Kenyan Education Sector and more particularly in Busia county; where it is domiciled.
The school has grown over the years and is now a fully recognized C4 Public Senior School. In January 2026, Osieko Senior School admitted the first grade 10 learners under the CBE Curriculum.
Location of Osieko Senior School.
Osieko Senior School’s exact physical location is in Busia County, Bunyala in the Western Region of the Republic of Kenya.
What to know about Western Region’s Senior Schools.
Western is the home of some of the best and highly competitive Senior Schools in Kenya. Osieko Senior School, just like other Senior schools in the region, favourably compete in co-curricular activities, academics and Infrastructural development. Before joining Osieko Senior School, confirm the pathways it offers.
Frequently Asked Questions About Osieko Senior School.
1. What is the UIC Code for Osieko Senior School?
The UIC Code for Osieko Senior School is 6LLJ.
2. Is Osieko Senior School a Boarding or Day School?
Osieko Senior School is a Day Senior School.
3. What CBE Grades are taught at Osieko Senior School?
Osieko Senior School offers CBE Senior Schools Grades at Grade 10, 11 and 12.
4. What is the Knec Code for Osieko Senior School?
The Official Knec Code for Osieko Senior School is 35610105.
5. In Which County is Osieko Senior School Found?
Osieko Senior School is located in Busia County.
6. Does Osieko Senior School admit Boys, Girls or Both?
Osieko Senior School is a Mixed Senior School.
7. What was Osieko Senior School’s Fomer Name under the 8-4-4 Education System?
Osieko Senior School was formerly called Osieko Secondary School.
8. What is Osieko Senior School’s New Cluster?
Osieko Senior School is now classified as a C4 Senior School.
9. Is there SNE Support for Learners at Osieko Senior School?
Osieko Senior School offers support for Regular learners. The school’s Disability Type is None.
10. Where is Osieko Senior School Located?
Osieko Senior School is found in Bunyala Subcounty of Busia County; in the Western Region of the Republic of Kenya.
11. Is a Osieko Senior School Private or Public School?
Osieko Senior School is a Public School.
12. What CBE Pathways are offered at Senior School?
Senior schools offere 3 pathways; STEM, Social Sciences and Arts and Sports.
