How many people live in Humboldt County, CA?
Updated Apr. 6, 2026Refreshed annually
In 2024, there were about 132,400 people living in Humboldt County, CA. That makes Humboldt County the 35th-most populous county in California. It is home to 0.34% of people living in the state.
132K
population of Humboldt County, CA (2024)
0.34%
County share of the California population (2024)
About 132,400 people lived in Humboldt County, CA in 2024.
Population estimates, 2000–2024
What are Humboldt County, CA’s age demographics?
About 27,800 Humboldt County residents are aged 65 and older in 2024. That represents 21% of its population. For comparison, the age group represents 16.6% of California’s population and 18% in the US overall.
Another 24,100 Humboldt County residents, or 18.2% of the population, were children under 18. For comparison, the age group represents 21.4% of California’s population and 21.6% in the US overall.
A lower share of Humboldt County, CA's population is aged under 18 than the US as a whole.
Population estimates by age group, (2024)
What are Humboldt County, CA’s racial and ethnic demographics?
Non-Hispanic white residents make up 70.6% of the Humboldt County, CA population, higher than the national share of 57.5%. Humboldt County, CA also has a larger share of people identifying as non-Hispanic two or more races (5.2%) than the US overall (2.5%).
In contrast, Humboldt County’s non-Hispanic Black or African American population accounts for 1.2%, below the 12.6% nationwide, and the Hispanic population makes up 14.6% of the county, compared with 20% nationally.
Racial and ethnic make up differ based on location. These figures reflect how people identified their race alone (not in combination with other races), and separate out Hispanic or Latino ethnicity, following Census reporting standards.
Humboldt County, CA has a higher share of a non-Hispanic white population than California as a whole.
Population estimates by race and ethnicity, (2024)
The largest city or town in Humboldt County, CA is Eureka with about 25,400 residents in 2024.
Cities and towns in Humboldt County, CA ranked by population
Population (2024), includes only portions within county
| City or town | Population | |
|---|---|---|
| 1. | Eureka | 25,412 |
| 2. | Arcata | 18,748 |
| 3. | Fortuna | 12,114 |
| 4. | Rio Dell | 3,259 |
| 5. | Ferndale | 1,361 |
| 6. | Blue Lake | 1,159 |
| 7. | Trinidad | 321 |
| 8. | Balance of Humboldt County | 70,006 |
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Methodology
USAFacts standardizes data, in areas such as time and demographics, to make it easier to understand and compare.
The analysis was generated with the help of AI and reviewed by USAFacts for accuracy.
Page sources
USAFacts endeavors to share the most up-to-date information available. We sourced the data on this page directly from government agencies; however, the intervals at which agencies publish updated data vary.
