Public senior school
Lenana School
A senior school in Dagoretti sub-county, Nairobi County. It offers STEM, Social Sciences and Arts & Sports Science, with 16 subject combinations.
School details admission facts are for the 2026 intake
- Cluster
- C1Ministry of Education senior-school cluster.
- Gender
- Boys
- Boarding or day
- Boarding
- 2026 fees
- This school’s approved fee schedule is not established here.Government-set schedule, not an individual school invoice.
- Ownership
- Public
- Founded
- 1949
- Motto
- Nihil Praeter Optimum
- Postal address
- 30253 NAIROBI
Not released yet for the January 2027 intake. Last year: 19 December 2025. KEMIS placement portal · Get an alert when they’re released.
KCSE results 2021–2025
Lenana School scored a mean of 9.49 (B) in KCSE 2025, 4.6 points above the national average, up from 9.06 in 2024. Over 2021–2025 it ranks 43rd of 559 schools in Kenya with 3 or more years of published results.
| 2025 | 2024 | 2023 | 2022 | 2021 | |
|---|---|---|---|---|---|
| Mean | 9.490 | 9.062 | 9.043 | 8.426 | 8.360 |
| Grade | B | B | B | B- | B- |
| Candidates | – | – | – | – | – |
Pathways and subject combinations checked 15 October 2026
STEM10 combinationsPure Sciences 2 · Applied Sciences 3 · Technical Studies 5
Social Sciences3 combinationsHumanities & Business Studies 3
Arts & Sports Science3 combinationsArts 2 · Sports 1
Subjects in these combinations · 21
Agriculture, Aviation, Biology, Building & Construction, Business Studies, Chemistry, Christian Religious Education, Computer Studies, Fine Arts, General Science, Geography, History & Citizenship, Literature in English, Media Technology, Metal Work, Music & Dance, Physics, Power Mechanics, Sports & Recreation, Theatre & Film, Wood WorkSenior schools in Nairobi County offering STEM · Social Sciences · Arts & Sports Science
Codes and registration
- KNEC code
- 20400001
- UIC
- 3KSM
- School code
- N1010089
- Level
- Senior school
- Sponsor
- Central Government/DEB
- Student needs
- Ordinary
- 2013 boarding or day
- Day
School figures most recent counts
- Students enrolled
- 1,500
- Teaching staff
- 53
- Classrooms
- 40
- Dormitories
- 11
- Laboratories
- 9
- Libraries
- 2
- Dining halls
- 2
- Toilets
- 64
- Acres
- 210
- Transition to university or college after KCSE 2024
- 397
Staff counted in 2007 ›
| Role | Men | Women | Total |
|---|---|---|---|
| TSC teachers | 16 | 35 | 51 |
| PTA and board teachers | 1 | 1 | 2 |
| Non-teaching staff | 55 | 13 | 68 |
School history
Lenana School was founded in 1949, in colonial times, as the Duke of York School. The colonial governor opened his official residence, Government House (now State House), to the first classes and dormitories while the school’s own campus at the edge of Ngong Forest in Karen was being completed. The school was then reserved for white students; its first African and Asian students joined after independence.
In 1969 it was renamed Lenana School, after the Maasai spiritual leader Lenana, and the names of its boarding houses were later changed to honour heroes of independent Kenya. It had six forms until the 8-4-4 system replaced A-levels in the late 1980s, when it moved to four.
Today it is a national boys’ boarding school in Karen, Nairobi. Its motto, “Nihil Praeter Optimum”, is Latin for “Nothing but the best”.
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Data sources
School history and updated details use the sources below. Other details come from the 2013 school data. Classification and codes come from the 2026 senior-school register.
Register, pathways and fees
- Ministry of Education Grade 10 selection portal (KEMIS) pathways, combinations, emblem · checked 15 October 2026
- June 2025 senior-school register, row 6501 checked 1 October 2026
- Kenya Gazette Notice No. 1449 2026 fee schedule
KCSE results
- KNEC for 2006–2010, the school’s audit reports and newspapers since: every source, on the results page 2006–2025
2013 school data
- Kenya Open Data Initiative 2013 school data
Map
- © OpenStreetMap contributors; county outline: IEBC via UN OCHA map data