Humboldt County GIS Maps

Humboldt County Maps

The maps below show a few of the county map styles included in our downloads. County packages include map exports in JPEG, PNG, SVG, PDF and GeoTIFF formats plus more than 20 GIS layers for mapping, research and analysis. Available layers include zip codes, area codes, subdivisions, school districts, political boundaries, roads, water features, points of interest and more.

County packages also include historical county demographics, business intelligence, analytical dashboards, AI-ready prompts, markdown files and related reference data. Everything is organized to save hours of manual work collecting current data, cleaning it and joining it together. That makes it easier to move faster on analytics, due diligence, business planning and location research. Paid packages are built for commercial use, but some package contents include source-specific attribution or notice guidance. Review Licensing & Data Source Notices.

Humboldt County Population

Humboldt County had 136,463 residents in 2020. That was 1.4% higher than in 2010. Humboldt County added 9,945 people between 2000 and 2020, which points to steady long-term growth. Eureka is the largest city in the county, but it accounts for only about 19% of the total population. The county is fairly spread out, with about 38 people per square mile. Some of the county's most populated postal areas include Eureka, Eureka and Arcata.

Population Trend in Humboldt County CA

Humboldt County Population per 2000, 2010 and 2020 census counts with a baseline 2030 projection.

Humboldt County Zip Codes

Humboldt County has 35 zip codes. Some of the county's most populated zip codes include Eureka (95503), Eureka (95501) and Arcata (95521). Eureka is the largest zip by population, with about 24,488 residents or 18% of the county total. Together, the three largest zips account for about 51% of all county residents based on 2020 population estimates.

Most Populated Zip Codes in Humboldt County CA

Humboldt County Zip Code populations and trends per most recent census data.

Humboldt County Demographics

Humboldt County has a median age of 39.6, which makes the county a little older than California overall. About 19% of residents are under 18, while 19.3% are 65 or older. That gives the county a fairly even mix of younger families and older adults. The largest age group is 25 to 44 at about 32.2% of the population, which points to a solid working-age base. About 32.1% of adults have a bachelor's degree or higher, above the statewide figure of 36.5%. The county is majority White by population, with Hispanic, Asian, Black and multiracial residents making up a meaningful share of the local mix.

Key Demographics for Humboldt County CA

Humboldt County School Districts

Humboldt County is served by 6 public school districts with 5,656 students enrolled in 2024. The largest districts on the county map are Eureka City Unified, Klamath-Trinity Joint Unified and Southern Humboldt Joint Unified. Those three districts account for about 89% of public school enrollment in the map area. Total enrollment has stayed fairly steady in recent years, but it is slightly lower than it was in 2017.

Largest School Districts by Enrollment in Humboldt County CA

Humboldt County school district enrollment and trends per most recent NCES reporting data.

Humboldt County Housing & Real Estate

Humboldt County has a median home value of $418,800 and a median gross rent of $1,249. About 56% of occupied homes in the county are owner-occupied, so the local housing market leans heavily toward ownership. Home values run below the California median, while rents come in below the state average. In March 2026, the median listing price was $475,000 and homes spent about 68 days on the market.

Businesses in Humboldt County, CA

Humboldt County has 6,100 business listings across 760 categories. The largest categories in Humboldt County business listings are Parks & Recreation (141, 2.3%), Churches & Religious Organizations (105, 1.7%), and Landmark And Historical Building (97, 1.6%). The full Humboldt County business listings dataset includes names, categories, addresses and contact details where available. Humboldt County packages also include U.S. Census County Business Patterns data with establishment counts, employment and payroll by industry sector.

Top Business Categories in Humboldt County, CA

Humboldt County Business Listings

Humboldt County business listings sourced from Overture Maps. Includes locations with a high level of confidence.

Humboldt County Basemaps

Humboldt County map and data packages include a set of useful basemaps to help you get started quickly. These include a custom light grey canvas, USGS topo, imagery and other reference layers that make it easier to build clear, meaningful county maps using the included GIS layers, your own data or both. Pre-rendered map tiles for the light grey basemap are included so you can use them offline or host them on your own CDN.

Preview a Live Package Demo

See exactly what is included in a county data package. Inspect how files are organized, the interactive data explorer and how maps and analytics are laid out. The demo loads a real sample package from California — explore the full structure before you buy.