| Colusa County | Sheriff | 39.17073 | -122.29524 | 30 |
| Colusa County | Fire/EMS | 39.17073 | -122.29524 | 30 |
| Colusa County | Services | 39.17073 | -122.29524 | 30 |
| Cities | Colusa | 39.20928 | -122.01118 | 1.5 |
| Cities | Williams | 39.15461 | -122.14942 | 1 |
| Amateur Radio in Colusa County | Repeaters | 39.17073 | -122.29524 | 30 |
