County
Humboldt County
This is the county layer. It is often the first stop for assessor, tax collector, recorder, court, social service, election, health, sheriff, and unincorporated-area services.
Starting point
Start with the county layer.
County offices are the usual first stop for records, taxes, courts, elections, public health, social services, sheriff services, and unincorporated-area routing.
Cities inside the county can still control city permits, local code, utilities, business licenses, and city-specific rules.
2025 population
131,647
Land area
3,568.025 sq mi
Water area
484.23 sq mi
Directory notes
Local layers to keep on the same page.
Property, taxes, and records
For assessed value, exemptions, ownership records, recording, and tax bills, county offices are usually the starting layer.
Unincorporated land
If an address is outside city limits, county planning, building, environmental health, fire, or public works may handle local permits and code work.
Courts, services, and alerts
Superior court, sheriff, elections, social services, emergency alerts, and health offices often start at the county level.
Practical notes
Office, map, permit, and paperwork notes for Humboldt County
Almanac notes
Stories and local context near Humboldt County
Place note · History and culture
Blue Lake keeps its Mad River railroad story close
Blue Lake grew from a small Mad River resort idea into a railroad and logging town, and the old depot museum still makes that story easy to picture.
Place note · History and culture
Fortuna's Friendly City story starts in the Eel River Valley
Fortuna grew from Springville, mills, rail, the Eel River Valley, and redwood-country travel into Humboldt County's Friendly City.
Place note · History and culture
Rio Dell sits where redwoods, bluffs, and the Eel River meet
Rio Dell's place story comes from Eagle Prairie, the Eel River, redwood country, Scotia next door, and a small downtown that grew fast enough to incorporate.
Place note · History and culture
Arcata Marsh turns a city chore into a wildlife walk
Arcata Marsh and Wildlife Sanctuary mixes wastewater treatment, constructed wetlands, birding, trails, mudflats, sloughs, and a practical civic idea that became a beloved outdoor place.
Place note · History and culture
Eureka's Carson Mansion is redwood money turned into architecture
The Carson Mansion in Eureka grew from Humboldt County redwood wealth into one of California's most recognizable Victorian buildings.
Place note · History and culture
Sue-meg State Park carries coast, redwoods, and Yurok place memory
Sue-meg State Park near Trinidad blends Agate Beach, forested headlands, tidepools, trails, camping, and Sumeg Village, a reconstructed Yurok village with deep local meaning.
Place note · History and culture
Trinidad Head Lighthouse uses a small tower on a big headland
Trinidad Head Lighthouse shows how a modest tower can matter when it sits high above a rugged harbor, sea stacks, tribal homelands, and a far-north coast route.
Place note · Outdoors
Headwaters Forest gives Humboldt a careful old-growth redwood walk
Headwaters Forest Reserve protects coastal redwood forest near Eureka, with Elk River Trail access, sensitive habitat, storm-season cautions, and public-use limits.