St. Mary’s Sosio Secondary School is a public C2 girls boarding senior school in Kimilili Sub-county, Bungoma County, Kenya. The 2026 senior-school register lists the KNEC examination centre code 36621105 and Unique Institution Code YUZX. This guide explains its location, KCSE results guidance, Grade 10 pathways and joining requirements.
St. Mary’s Sosio Secondary School: School Details
- County: Bungoma
- Sub-county: Kimilili
- School ownership: Public
- 2026 cluster: C2
- School type: girls boarding
- KNEC code: 36621105
- UIC: YUZX
- Historical postal address: P.O. Box 401 – 50204 Kimilili (verify before use)
KNEC codes identify examination centres, while UIC numbers identify registered senior schools. Old postal details may not provide current campus directions. Confirm the school’s current location and contact information directly with its administration.
St. Mary’s Sosio Secondary School: Contacts and Physical Location
For official phone numbers, email addresses, the school’s website, precise directions and reporting dates, contact the school office or Kimilili Sub-County Education Office. No unverified contact details or payment accounts are included. Confirm all school fees using the genuine joining letter and an authenticated school payment channel.
St. Mary’s Sosio Secondary School: KCSE Examination Results
The Kenya National Examinations Council administers KCSE examinations. Consult the official KNEC results service for results-release and access instructions, and obtain certified records from the examination centre. For historic school performance, request authenticated mean grades, candidate totals and subject results for specific years rather than relying on unsupported school rankings or invented examination figures.
St. Mary’s Sosio Secondary School: Grade 10 Pathways and Placement
Kenya’s senior-school curriculum provides three broad pathways: Science, Technology, Engineering and Mathematics (STEM), Social Sciences, and Arts and Sports Science. Individual schools offer different approved subject combinations. Consult the Ministry of Education Grade 10 selection and placement portal to check the school’s registered identity, available courses, placement results and joining guidance. Learners should choose options appropriate to their strengths, interests, talents and educational ambitions.
St. Mary’s Sosio Secondary School: Fees and Joining Requirements
Request an official joining letter, the latest approved fee schedule, reporting date, uniform instructions, educational materials, required identification documents and secure payment details from the school. Boarding families should confirm accommodation, bedding and personal-supply requirements. National fee guidance is not the same as an individual school’s authorised invoice.
Frequently Asked Questions
Where is St. Mary’s Sosio Secondary School?
It is registered in Kimilili Sub-county, Bungoma County. Ask the school for exact directions.
What are its KNEC code and UIC?
KNEC 36621105 and UIC YUZX.
Is it day or boarding?
Published 2026 classification: C2 girls boarding. Confirm later changes with the administration.
How do I confirm Grade 10 placement?
Use the official selection and placement portal and the learner’s joining letter.
St. Mary’s Sosio Secondary School: School Illustration

Information Sources
Published senior-school classification and identifiers: school listing. Official services: Grade 10 placement and KNEC. Verify current postal details, contacts and fees with the school.