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 in Lamu County:
| KNEC CODE | NAME | TYPE | CATEGORY | |
| 1 | 06104301 | WITU SECONDARY SCHOOL | Mixed | County |
| 2 | 6118101 | FAZA SECONDARY SCHOOL | Mixed | County |
| 3 | 06130101 | LAMU BOYS SECONDARY SCHOOL | Boys | County |
