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 Meru County:
| NAME | KNEC CODE | TYPE | CATEGORY | |
| 1 | KIRIGE HIGH SCHOOL | 15304107 | Boys | County |
| 2 | NTHIMBIRI SECONDARY SCHOOL | 15304110 | Boys | County |
| 3 | GIAKI GIRLS SECONDARY SCHOOL | 15304201 | Girls | County |
| 4 | CHUGU BOYS SECONDARY SCHOOL | 15304202 | Boys | County |
| 5 | MULATHANKARI GIRLS HIGH SCHOOL | 15304204 | Girls | County |
| 6 | THUURA SECONDARY SCHOOL | 15304205 | Boys | County |
| 7 | NKABUNE GIRLS SECONDARY SCHOOL | 15304206 | Girls | County |
| 8 | MUNITHU SECONDARY SCHOOL | 15304207 | Girls | County |
| 9 | NKANDO SECONDARY SCHOOL | 15318102 | Boys | County |
| 10 | RUIGA GIRLS SECONDARY SCHOOL | 15318103 | Girls | County |
| 11 | MWANGANTHIA SECONDARY SCHOOL | 15318201 | Mixed | County |
| 12 | GAITU SECONDARY SCHOOL | 15318203 | Mixed | County |
| 13 | KAONGO GIRLS SECONDARY SCHOOL | 15318204 | Girls | County |
| 14 | KIAMURI SECONDARY SCHOOL | 15318209 | Mixed | County |
| 15 | KEERU SECONDARY SCHOOL | 15318302 | Boys | County |
| 16 | KITHIRUNE GIRLS’ SECONDARY SCHOOL | 15318305 | Girls | County |
| 17 | KATHERI HIGH SCHOOL | 15318307 | Boys | County |
| 18 | GITHONGO SECONDARY SCHOOL | 15318308 | Boys | County |
| 19 | KARUGWA GIRLS’ SECONDARY SCHOOL | 15318311 | Girls | County |
| 20 | KATHERI GIRLS HIGH SCHOOL | 15318328 | Girls | County |
| 21 | NKUENE MIXED SECONDARY SCHOOL | 15319103 | Boys | County |
| 22 | UKUU HIGH SCHOOL | 15319105 | Girls | County |
| 23 | KATHERA SECONDARY SCHOOL | 15319106 | Boys | County |
| 24 | MIKUMBUNE SECONDARY SCHOOL | 15319107 | Boys | County |
| 25 | KATHERA GIRLS SECONDARY SCHOOL | 15319108 | Girls | County |
| 26 | NYAGENE GIRLS’ SECONDARY SCHOOL | 15319109 | Girls | County |
| 27 | URUKU GIRLS SECONDARY SCHOOL | 15319110 | Girls | County |
| 28 | NDAGENE SECONDARY SCHOOL | 15319202 | Boys | County |
| 29 | KITHANGARI GIRLS SECONDARY SCHOOL | 15319203 | Girls | County |
| 30 | KITHATU GIRLS SECONDARY SCHOOL | 15319204 | Girls | County |
| 31 | IGOKI BOYS’ SECONDARY SCHOOL | 15319206 | Boys | County |
| 32 | IGANDENE SECONDARY SCHOOL | 15319208 | Boys | County |
| 33 | MACHIKINE GIRLS SECONDARY SCHOOL | 15319210 | Girls | County |
| 34 | KITHANGARI BOYS SECONDARY SCHOOL | 15319214 | Boys | County |
| 35 | MARAA SECONDARY SCHOOL | 15319221 | Girls | County |
| 36 | MIRURIIRI BOYS SECONDARY SCHOOL | 15319303 | Boys | County |
| 37 | ST AGNES-GAUKUNE GIRLS SECONDARY SCHOOL | 15319308 | Girls | County |
| 38 | MIRURIIRI GIRLS SECONDARY SCHOOL | 15319318 | Girls | County |
| 39 | ST. LUKE’S SECONDARY SCHOOL | 15327102 | Boys | County |
| 40 | KANJALU GIRLS SECONDARY SCHOOL | 15327103 | Girls | County |
| 41 | AKITHII GIRLS SECONDARY SCHOOL | 15327104 | Girls | County |
| 42 | KIMACHIA SECONDARY SCHOOL | 15327105 | Mixed | County |
| 43 | KIBULINE SECONDARY SCHOOL | 15327106 | Mixed | County |
| 44 | ATHWANA HIGH SCHOOL | 15327107 | Mixed | County |
| 45 | KIANJAI SECONDARY SCHOOL | 15327108 | Boys | County |
| 46 | KITHEO SECONDARY SCHOOL | 15327109 | Mixed | County |
| 47 | URINGU GIRLS SECONDARY SCHOOL | 15327110 | Girls | County |
| 48 | MCK MITUNTU GIRLS’ SECONDARY SCHOOL | 15327111 | Girls | County |
| 49 | ST.FRANCIS OF ASSISI SECONDARY SCHOOL – MURAMBA | 15327113 | Mixed | County |
| 50 | FGCK KISIMA SECONDARY SCHOOL | 15334103 | Mixed | County |
| 51 | ANTUBETWE KIONGO SECONDARY SCHOOL | 15337102 | Mixed | County |
| 52 | MUTUATI SECONDARY SCHOOL | 15337201 | Mixed | County |
| 53 | NAATHU SECONDARY SCHOOL | 15337203 | Girls | County |
| 54 | ANTUAMBUI SECONDARY SCHOOL | 15337303 | Boys | County |
| 55 | ST. CYPRIAN BOYS’ HIGH SCHOOL | 15349101 | Boys | County |
| 56 | KARAMA SECONDARY SCHOOL | 15349102 | Boys | County |
| 57 | ST.ANGELAS GIRLS SECONDARY SCHOOL | 15349103 | Girls | County |
| 58 | NYAMBENE GIRLS SECONDARY SCHOOL | 15349104 | Girls | County |
| 59 | ST. MARY’S MBARANGA SECONDARY SCHOOL | 15349105 | Mixed | County |
| 60 | EAPC RUMANTHI GIRLS SECONDARY SCHOOL | 15349111 | Mixed | County |
| 61 | MUKUIRU MIXED DAY BOARDING SECONDARY SCHOOL | 15349119 | Mixed | County |
| 62 | AKAIGA SECONDARY SCHOOL | 15361101 | Boys | County |
| 63 | IRINDIRO SECONDARY SCHOOL | 15361108 | Mixed | County |
| 64 | KALIENE SECONDARY SCHOOL | 15361109 | Mixed | County |
| 65 | RWARE GIRLS SECONDARY SCHOOL | 15361122 | Girls | County |
| 66 | AKIRANG’ONDU SECONDARY SCHOOL | 15362115 | Boys | County |
| 67 | THITHA SECONDARY SCHOOL | 15362208 | Mixed | County |
| 68 | KIIRUA BOYS SECONDARY SCHOOL | 15364201 | Boys | County |
| 69 | NAARI SECONDARY SCHOOL | 15364202 | Girls | County |
| 70 | MUCHEENE SECONDARY SCHOOL | 15364303 | Mixed | County |
| 71 | GAKANDO GIRLS SECONDARY SCHOOL | 15364304 | Girls | County |
