Athi River Mixed Sec School (formerly called Athi River Mixed Sec School) is a C4 Public Mixed Senior School that is physically located in Machakos County, Athi-River in the Eastern Region of the Republic of Kenya. This article provides all the details about Athi River Mixed Senior School, including: the school’s cluster, level, UIC Code, Knec Code, Admissions and location.
This Day Senior School forms part of the Machakos Education Network and has fully transitioned to a Senior School that offers Competency Based Education (CBE) Curriculum to Grade 10, 11 and 12 Learners.
Athi River Mixed Senior School School’s Basic Data and National Information.
| School’s Old Name | Athi River Mixed Sec School |
| School’s New Name | Athi River Mixed Senior School |
| Cluster | C4 |
| Gender | Mixed |
| Accomodation Type | Day |
| Region | Eastern |
| County | Machakos |
| Sub County | Athi-River |
| UIC Code | FZMQ |
| KNEC Code | 12330120 |
| Type of School | Public |
| Regular or SNE | Regular |
| Disability Type | None |
Athi River Mixed 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 Athi River Mixed 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.
Athi River Mixed Senior School’s Background and History.
Athi River Mixed Senior School, historically known as Athi River Mixed Sec School, has played a very key role in the Kenyan Education Sector and more particularly in Machakos 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, Athi River Mixed Senior School admitted the first grade 10 learners under the CBE Curriculum.
Location of Athi River Mixed Senior School.
Athi River Mixed Senior School’s exact physical location is in Machakos County, Athi-River in the Eastern Region of the Republic of Kenya.
What to know about Eastern Region’s Senior Schools.
Eastern is the home of some of the best and highly competitive Senior Schools in Kenya. Athi River Mixed Senior School, just like other Senior schools in the region, favourably compete in co-curricular activities, academics and Infrastructural development. Before joining Athi River Mixed Senior School, confirm the pathways it offers.
Frequently Asked Questions About Athi River Mixed Senior School.
1. What is the UIC Code for Athi River Mixed Senior School?
The UIC Code for Athi River Mixed Senior School is FZMQ.
2. Is Athi River Mixed Senior School a Boarding or Day School?
Athi River Mixed Senior School is a Day Senior School.
3. What CBE Grades are taught at Athi River Mixed Senior School?
Athi River Mixed Senior School offers CBE Senior Schools Grades at Grade 10, 11 and 12.
4. What is the Knec Code for Athi River Mixed Senior School?
The Official Knec Code for Athi River Mixed Senior School is 12330120.
5. In Which County is Athi River Mixed Senior School Found?
Athi River Mixed Senior School is located in Machakos County.
6. Does Athi River Mixed Senior School admit Boys, Girls or Both?
Athi River Mixed Senior School is a Mixed Senior School.
7. What was Athi River Mixed Senior School’s Fomer Name under the 8-4-4 Education System?
Athi River Mixed Senior School was formerly called Athi River Mixed Sec School.
8. What is Athi River Mixed Senior School’s New Cluster?
Athi River Mixed Senior School is now classified as a C4 Senior School.
9. Is there SNE Support for Learners at Athi River Mixed Senior School?
Athi River Mixed Senior School offers support for Regular learners. The school’s Disability Type is None.
10. Where is Athi River Mixed Senior School Located?
Athi River Mixed Senior School is found in Athi-River Subcounty of Machakos County; in the Eastern Region of the Republic of Kenya.
11. Is a Athi River Mixed Senior School Private or Public School?
Athi River Mixed 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.