Identifiers: city · CDP
| Rank | Community | Population |
|---|---|---|
| 1 | Yreka (city), CA | 7,807 |
| 2 | Weed (city), CA | 2,862 |
| 3 | Lake Shastina (CDP), CA | 2,401 |
| 4 | Montague (city), CA | 1,226 |
| 5 | Fort Jones (city), CA | 695 |
| 6 | Grenada (CDP), CA | 314 |
| 7 | Hornbrook (CDP), CA | 266 |
| 8 | Carrick (CDP), CA | 143 |
| 9 | Gazelle (CDP), CA | 95 |
| 10 | Edgewood (CDP), CA | 72 |