Fire Districts
| Fire Districts – North County | |
| Northern Humboldt Regional Fire Providers | |
| CSA No. 4 (Westhaven to Freshwater Lagoon) | |
| Orick CSD | |
| Trinidad |
| Fire Districts – East County | |
| East County Regional Fire Providers | |
| Blue Lake FPD | |
| Kneeland FPD | |
| Willow Creek FPD |
| Fire Districts – Humboldt Bay Region | |
| Humboldt Bay Regional Fire Providers | |
| Humboldt Bay Fire Authority | |
| Arcata FPD | |
| Fieldbrook-Glendale CSD |
| Fire Districts – Eel River Valley | |
| Eel River Valley Regional Fire Providers | |
| Bridgeville FPD | |
| Carlotta FPD | |
| Ferndale FPD | |
| Fortuna FPD | |
| Loleta FPD | |
| Petrolia FPD | |
| Rio Dell FPD | |
| Scotia VFD |
| Fire Districts – South County | |
| Southern Humboldt Regional Fire Providers | |
| Briceland FPD | |
| Fruitland Ridge FPD | |
| Garberville FPD | |
| Miranda CSD | |
| Myers Flat FPD | |
| Redway FPD | |
| Resort Improvement District No. 1 | |
| Telegraph Ridge FPD | |
| Weott CSD | |
| Whitethorn FPD |
Water Districts
| County Water Districts | |
| Alderpoint County Water District | |
| Humboldt Bay Municipal Water District | |
| Hydesville County Water District | |
| Jacoby Creek County Water District |
Community Services Districts
| Community Services Districts | |
| Big Lagoon Community Services District | |
| Briceland Community Services District | |
| Carlotta Community Services District | |
| Fieldbrook-Glendale Community Services District | |
| Humboldt Community Services District | |
| Loleta Community Services District | |
| Manila Community Services District | |
| McKinleyville Community Services District | |
| Miranda Community Services District | |
| Orick Community Services District | |
| Orleans Community Services District | |
| Palmer Creek Community Services District | |
| Patrick Creek Community Services District | |
| Phillipsville Community Services District | |
| Redway Community Services District | |
| Riverside Community Services District | |
| Samoa Peninsula Community Services District | |
| Scotia Community Services District | |
| Weott Community Services District | |
| Westhaven Community Services District | |
| Willow Creek Community Services District |
Cities
| Cities | |
| City of Arcata | |
| City of Eureka | |
| City of Ferndale | |
| City of Fortuna | |
| City of Rio Dell | |
| City of Trinidad |
Other
| Other Districts | |
| Southern Humboldt Community Healthcare District |