County secondary schools in Kenya form the third tier after national and extra-county schools respectively.
Most of Kenyan learners are absorbed by these schools.
Admission to county schools is done online by the Ministry of Education.
They are either mixed or single-sex.
Here is a list of county schools found in Kakamega County:
| KNEC CODE | NAME OF SCHOOL | TYPE | CATEGORY | |
| 1 | 37603003 | MATENDE SECONDARY SCHOOL | Girls | County |
| 2 | 37603104 | MATIOLI SECONDARY SCHOOL | Boys | County |
| 3 | 37603105 | SHIKOTI GIRLS SECONDARY SCHOOL | Girls | County |
| 4 | 37607001 | LUMAKANDA BOYS HIGH SCHOOL | Boys | County |
| 5 | 37607002 | BISHOP SULUMETI GIRLS SECONDARY SCHOOL – LUGARI | Girls | County |
| 6 | 37607005 | MUNYUKI MIXED SECONDARY SCHOOL | Mixed | County |
| 7 | 37607103 | ST CECILIA GIRLS MAUTUMA SECONDARY SCHOOL | Girls | County |
| 8 | 37607104 | HANDOW SECONDARY SCHOOL | Mixed | County |
| 9 | 37607202 | CHEKALINI SECONDARY SCHOOL | Mixed | County |
| 10 | 37614103 | MALAVA GIRLS SECONDARY SCHOOL | Girls | County |
| 11 | 37614204 | ST ANTHONY KAKOYI SECONDARY SCHOOL | Mixed | County |
| 12 | 37614209 | FRIENDS GIRLS HIGH SCHOOL KIMANG’ETI | Girls | County |
| 13 | 37614310 | SILUNGAI SECONDARY SCHOOL | Boys | County |
| 14 | 37614314 | FRIENDS SECONDARY SCHOOL – SILUNGAI GIRLS’ | Girls | County |
| 15 | 37614409 | SAMITSI GIRLS SECONDARY | Girls | County |
| 16 | 37614501 | KAKUNGA GIRLS SECONDARY SCHOOL | Girls | County |
| 17 | 37614503 | SHAMBERERE SECONDARY SCHOOL | Mixed | County |
| 18 | 37614504 | ST. MARY’S SHIHOME GIRLS’ SECONDARY SCHOOL | Girls | County |
| 19 | 37615006 | LIRHEMBE GIRLS SECONDARY SCHOOL | Girls | County |
| 20 | 37615011 | SHIKOKHO SECONDARY SCHOOL | Mixed | County |
| 21 | 37615013 | MAKHOKHO SECONDARY SCHOOL | Mixed | County |
| 22 | 37616002 | LIRHANDA GIRLS SECONDARY SCHOOL | Girls | County |
| 23 | 37616021 | ST.PHILIPS MUKOMARI SECONDARY SCHOOL | Girls | County |
| 24 | 37617203 | MUMIAS BOYS MUSLIM SECONDARY SCHOOL | Boys | County |
| 25 | 37617204 | MUMIAS MUSLIM GIRLS SECONDARY SCHOOL | Girls | County |
| 26 | 37617207 | ST. ELIZABETH LUREKO GIRLS SECONDARY SCHOOL | Girls | County |
| 27 | 37617401 | A.C.K MILIMANI GIRLS | Girls | County |
| 28 | 37617403 | ST. ELIZABETH BUMIA GIRLS’ SECONDARY SCHOOL | Girls | County |
| 29 | 37617405 | ST ANDREWS ESHIKALAME SECONDARY SCHOOL | Mixed | County |
| 30 | 37624001 | FRIENDS SCHOOL LUKHOKHO | Girls | County |
| 31 | 37624003 | MAKHUKHUNI SECONDARY SCHOOL | Mixed | County |
| 32 | 37624019 | ST. MUKASA GIRLS’ SECONDARY SCHOOL-CHIMOI | Girls | County |
| 33 | 37625102 | EMALINDI GIRLS SECONDARY SCHOOL | Girls | County |
| 34 | 37625109 | KHWISERO GIRLS SECONDARY SCHOOL | Girls | County |
| 35 | 37625112 | MUNDOLI ACK GIRLS HIGH SCHOOL | Girls | County |
| 36 | 37627103 | KOYONZO SECONDARY SCHOOL | Mixed | County |
| 37 | 37627106 | ST. JAMES NAMAMBA SECONDARY SCHOOL | Mixed | County |
| 38 | 37627116 | ST.TERESA’S ITETE SECONDARY SCHOOL | Mixed | County |
| 39 | 37631501 | ESHIKULU BOYS SECONDARY SCHOOL | Boys | County |
| 40 | 37632103 | NAMIRAMA GIRLS HIGH SCHOOL | Girls | County |
| 41 | 37632207 | ST KIZITO SECONDARY SCHOOL LUSUMU | Mixed | County |
| 42 | 37634312 | SHITOTO GIRLS’ SECONDARY SCHOOL | Girls | County |
| 43 | 37634316 | ST. MARTHA’S MWITOTI SECONDARY SCHOOL | Mixed | County |
| 44 | 37634321 | ST PAUL’S LUBINU GIRLS SECONDARY SCHOOL | Girls | County |