| Name | City | Management type |
|---|---|---|
| Clear Lake High | Lakeport | Public |
| Intermountain High | Cobb | Public |
| Kelseyville High | Kelseyville | Public |
| Lower Lake High | Lower Lake | Public |
| Middletown High | Middletown | Public |
| Riviera High | Kelseyville | Public |
| Upper Lake High | Upper Lake | Public |