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 secondary schools in Elgeyo Marakwet County:
| KNEC CODE | NAME | TYPE | CATEGORY | |
| 1 | 34518103 | ST.ALPHONSUS MUTEI GIRLS’ SECONDARY SCHOOL | Girls | County |
| 2 | 34518105 | KIMURON SECONDARY SCHOOL | Boys | County |
| 3 | 34518403 | ANIN SECONDARY SCHOOL | Girls | County |
| 4 | 34518404 | KAPTUM SECONDARY SCHOOL | Mixed | County |
| 5 | 34518405 | KABULWO SECONDARY SCHOOL | Mixed | County |
| 6 | 34518408 | KIBENDO SECONDARY SCHOOL | Mixed | County |
| 7 | 34520105 | CHEBIEMIT SECONDARY SCHOOL | Boys | County |
| 8 | 34520106 | KIMNAI GIRLS SECONDARY SCHOOL | Girls | County |
| 9 | 34520107 | CHEBARA GIRLS SECONDARY SCHOOL | Girls | County |
| 10 | 34520203 | ST. TERESA GIRLS SECONDARY SCHOOL – KOIBARAK | Girls | County |
| 11 | 34520301 | CHEBAI SECONDARY SCHOOL | Mixed | County |
| 12 | 34520303 | KAPCHEROP BOYS HIGH SCHOOL | Boys | County |
| 13 | 34520304 | CHEBORORWA SECONDARY SCHOOL | Girls | County |
| 14 | 34520305 | ST.JOSEPH’S LELAN BOYS SECONDARY SCHOOL | Boys | County |
| 15 | 34520306 | MOI KAPCHEROP GIRLS SECONDARY SCHOOL | Girls | County |
| 16 | 34559202 | KITANY SECONDARY SCHOOL | Boys | County |
| 17 | 34559203 | LELBOINET BOYS HIGH SCHOOL | Boys | County |
| 18 | 34559205 | BIWOTT SECONDARY SCHOOL | Mixed | County |
| 19 | 34559206 | KOPTEGA SECONDARY SCHOOL | Girls | County |
| 20 | 34559207 | ST. JOSEPH’S GIRLS SECONDARY SCHOOL, KIPSAINA | Girls | County |
| 21 | 34559209 | ATNAS KANDIE SECONDARY SCHOOL | Boys | County |
| 22 | 34559210 | KIPTULOS SECONDARY SCHOOL | Mixed | County |
| 23 | 34559301 | AIC SOY GIRLS SECONDARY SCHOOL | Girls | County |
| 24 | 34559302 | KIMWARER SECONDARY SCHOOL | Boys | County |
| 25 | 34559303 | ST.AUGUSTINE SECONDARY SCHOOL EMSEA | Boys | County |
| 26 | 34559306 | DANIEL ADVENTIST HIGH SCHOOL – KAPTUBEI | Mixed | County |
| 27 | 34559504 | KAPKITONY GIRLS SECONDARY SCHOOL | Girls | County |
| 28 | 34559505 | KOCHOLWO SECONDARY SCHOOL | Mixed | County |
| 29 | 34561101 | KERIO VALLEY SECONDARY SCHOOL | Boys | County |
| 30 | 34561102 | ST.PAUL’S KAPKONDOT GIRLS SECONDARY SCHOOL | Girls | County |
| 31 | 34561202 | KAMASIA MIXED SECONDARY SCHOOL | Mixed | County |
| 32 | 34561303 | CHESEWEW SECONDARY SCHOOL | Boys | County |
| 33 | 34561306 | ST.PAUL SAMBIRIR BOYS SECONDARY SCHOOL | Boys | County |
