According to the 2020 US Census, the total population of Humboldt County was 134,623. The county has 7 incorporated cities ranging in size from approximately 400 to 27,000 persons. Approximately half of the county’s residents live in incorporated communities, while 59% of the county lives in the area surrounding Humboldt Bay. This area includes the cities of Arcata, Ferndale, Fortuna, Eureka and the unincorporated community of McKinleyville.
Population by Location
According to the US Census, the cities of Eureka and Arcata together contain about 33 percent of the county’s population. Meanwhile 13 percent of the population is scattered among 5 other incorporated cities.
Blue Lake, 1,253
Rio Dell 3,368
Approximately 71,196 of county residents reside in unincorporated communities.
In terms of regional population trends, the chief growth areas of the county are around the communities of McKinleyville and Garberville, and the cities of Arcata and Fortuna. Most of these regions have an adequate supply of land and necessary public facilities for urban use and can, therefore, be expected to remain as principal growth areas, respectively. The following chart details county population over the last 2 decades, according to the US Census.