Identifiers: city · CDP · town
| Rank | Community | Population |
|---|---|---|
| 1 | Chico (city), CA | 101,475 |
| 2 | Oroville (city), CA | 20,042 |
| 3 | Marysville (city), CA | 12,844 |
| 4 | Live Oak (city), CA | 9,106 |
| 5 | Oroville East (CDP), CA | 8,038 |
| 6 | Gridley (city), CA | 7,421 |
| 7 | Thermalito (CDP), CA | 7,198 |
| 8 | Durham (CDP), CA | 5,834 |
| 9 | Palermo (CDP), CA | 5,555 |
| 10 | Paradise (town), CA | 4,764 |
| 11 | South Oroville (CDP), CA | 3,235 |
| 12 | Kelly Ridge (CDP), CA | 3,006 |
| 13 | Biggs (city), CA | 1,964 |
| 14 | Butte Valley (CDP), CA | 945 |
| 15 | Honcut (CDP), CA | 306 |
| 16 | Richvale (CDP), CA | 234 |
| 17 | Robinson Mill (CDP), CA | 89 |