Extra county schools in Kiambu are boarding, high-performing schools with a mean score of 6.5 and above. Today, there are some 283 extra county schools. They complement national schools in promoting integration and improving education standards. They admit students from the host county and others from outside the county
Kiambu County Is Made Up Of Twelve Sub-Counties Namely,
- Githunguri
- Kiambaa
- Lari
- Limuru
- Kabete
- Gatundu North
- Gatundu South
- Juja, Kikuyu
- Thika town
- Ruiru and
- Kiambu Town.
Some of the National Schools in Kiambu include;
- Alliance High School,
- Alliance Girls
- Mang’u High
- Mary Hill Girls
- Limuru Girls
- Loreto High School.
Top 10 Extra County Schools In Kiambu County
- Thika Boys High School
- Chania Boys, Chania Girls
- St Francis Girls
- Kiambu High School.
- Thika High School
- Kanunga High School
- Loreto Girls High
- Kiambu ST Annes Secondary School
- Kijabe Boys High School
| Name of the School | Location | Annual fees | Academic performance |
| 1.Kanunga High School | Located in Kiambaa near Kiambu town, Kiambaa Constituency in Kiambu County | Kes 70,000 to 80000 per year | Mean Grade of 8.547 |
| 2. Loreto Girls High School | Located in Karambaini, Limuru in Kiambu County | Kes 75,000 | Mean Grade of 10.512 |
| 3. Kiambu ST Annes Secondary School | Located in Tinganga near Kiambu Town in Kiambu Constituency in Kiambu County | Kes 74,000 | Mean Grade of 8.783 |
| 4. Kiambu High School | Located in Karuri, Kiambaa Constituency | Kes 76,700 | Mean Grade of 8.900 |
| 5. Ndumberi Girls Secondary School | Located in Ndumberi Location in Kiambu County | Kes 78,200 | Mean Grade of 7.533 |
| 6. Thika High School | Located in the Thika district near Thika town Kiambu County | Kes 75,798 | Mean Grade of 8.886 |
| 7. Chania Boys’ High School | Located near Thika town in Kiambu County. | Kes 80,000 | Mean Grade of 8.752 |
| 8. Chania Girls High School | Located near Thika town, in Kiambu county | Kes 75,000 | Mean Grade of 9.000 |
| 9.Kijabe Boys High School | Located in Kijabe Road, in Kijabe Kiambu County. | Kes 75,798 | Mean Grade of 9.213 |
The Best Sub-County Schools In Kiambu
Apart from having the best national schools, the famous county also has one of the best sub-county schools in the country. Some of the best sub-county schools in Kiambu include
- Juja Secondary
- Gichuru High School, and
- Fr. Kevin Kelly High School
The Best Secondary School In Kiambu
St . Annes Lioki Secondary School is the best secondary school in Kiambu County. This school is located in IKINU in Kiambu County. In addition, the school is a boarding school owned and funded by a religious organization.
Other Best Secondary Schools In Kiambu County
- St Mary’s Thigio Secondary School
- Our Lady of Fatima-Kiriko Secondary School.
- St Ann Gichocho
- Handege Secondary School
- William Ngiru Gitau Secondary School
