ZIP Codes of Humboldt County, CA

Population & People
Population & People
Total Population
134,809
Household Income
Household Income
Median Income
$61,067
Housing
Housing
Total Housing Units
63,110
Business & Economy
Business & Economy
Total Businesses
3,170
Employment
Employment
Employment Rate
51.50%
Education
Education
Bachelor's Degree+
33.07%
Source: U.S. Census ACS 2024 5-Year Estimates · rolled up across the 38 ZIPs in this county.
Data Last Updated: June 1, 2026
ZIP Codes:38 ZIP Codes (29 Standard, 9 PO Box, 0 Unique) [See All]
Area Codes:369 / 530 / 707
Timezone:Pacific (GMT -08:00)
Local Time:2:11:28 PM
Population:134,809 [See All]
FIPS:06023
CBSA:Eureka-Arcata, CA
Land Area:3,530 sq mi
Water Area:46 sq mi
Coordinates:40.6117, -123.9645
Quick Link:
https://www.zip-codes.com/county/ca-humboldt.asp
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Sharp income gradient
Wealthiest ZIP earns 4.1× the poorest — $96,827 vs $23,720.
Wide geographic spread
ZIPs range from 382.4 sq mi down to 3.36 — a 114× sprawl ratio.
Striking education divide
Bachelor's share spans 12.9% to 59.7% — a 47-point gap.

Standout ZIPs in this County


Most Populous
Eureka · 25,054 people
18.6% of county total
Highest Income
Hydesville · $96,827 median
1.6× county average
Largest Land Area
Hoopa · 382.4 sq mi
Spans the most ground
Fastest Growth
Trinidad · 26.7% (10-yr)
2,083 → 2,640 residents
Most Educated
Bayside · 59.7% bachelor's+
689 of 1,155 adults 25+

Things worth knowing about Humboldt County


134,809 residents live across 38 ZIPs covering 3,530 sq mi, served by 35 distinct USPS-recognized cities.

Population moved from 134,935 to 134,809 from 2014 to 2024 — a -0.1% change. 13 ZIPs gained residents, 22 lost.

The county's wealthiest ZIP 95547 (Hydesville, $96,827 median) and poorest ZIP 95560 (Redway, $23,720) are 31.8 miles apart — a 4.1× income gap across local geography.

Median home values vary 2.6× across this county — from $253,400 in 95546 (Hoopa) to $651,600 in 95549 (Kneeland).

Density varies 819× across the county — from 4 people/sq mi in 95526 (Bridgeville) to 3,259 in 95501 (Eureka).

Educational attainment ranges from 12.9% bachelor's+ in 95562 (Rio Dell) to 59.7% in 95524 (Bayside) — the breadth of educational profiles across the area.

Within California, this is the #35 most populous of 58 counties and ranks #54 for median household income .

Weighted by population, the typical household earns about $62,480 across the county — reflecting what a typical resident sees, not a simple ZIP average.

33.1% of adults age 25+ hold a bachelor's degree or higher (30,837 of 93,256 reporting).

29 Standard delivery, 9 PO Box only, 0 single-entity Unique ZIPs serve this county.

Stories about Humboldt County


Two counties in one

Median household income spans 4.1× between the wealthiest and poorest ZIPs — a sign of significant intra-county inequality.

Wealthiest ZIP
Hydesville
Median income: $96,827
Population: 1,263
Bachelor's+: 24.7%
vs
Poorest ZIP (pop >= 500)
Redway
Median income: $23,720
Population: 1,213
Bachelor's+: 0.0%
For every $1 of household income in 95560, the typical household in 95547 earns $4.08.

Big & sparse

A frontier county — vast land area with only a few residents per square mile. Daily life looks very different here than in the country's denser counties.

Total area
3,530
square miles
Avg density
38.2
people per sq mi
Population
134,809
across 38 ZIPs
Hoopa
382.4 sq mi
2,397 residents
Garberville
364.8 sq mi
2,463 residents
Ferndale
242.2 sq mi
3,050 residents

All ZIP Codes in Humboldt County


ZIPCityTypePopulationMedian IncomeArea (sq mi)10-yr Growth
95503EurekaStandard25,054$71,85589.80.6%
95501EurekaStandard22,890$54,1377.0-3.7%
95521ArcataStandard21,980$53,11464.85.8%
95519MckinleyvilleStandard18,728$73,28089.11.3%
95540FortunaStandard14,469$63,69544.111.2%
95562Rio DellStandard3,422$42,9755.1-0.4%
95536FerndaleStandard3,050$73,375242.2-0.9%
95570TrinidadStandard2,640$74,777111.226.7%
95542GarbervilleStandard2,463$46,104364.8-9.4%
95546HoopaStandard2,397$61,607382.4-30.2%
95551LoletaStandard1,880$64,51950.93.0%
95524BaysideStandard1,634$87,5006.9-14.1%
95525Blue LakeStandard1,441$57,379236.4-13.6%
95528CarlottaStandard1,286$55,481100.81.0%
95547HydesvilleStandard1,263$96,8277.1-6.2%
95560RedwayStandard1,213$23,72025.3-11.7%
95589WhitethornStandard1,115$43,040112.5-9.1%
95573Willow CreekStandard1,089$47,258100.8-24.0%
95549KneelandStandard1,024$95,179196.717.8%
95556OrleansPO Box949189.744.9%
95553MirandaPO Box789$41,45091.2-32.7%
95565ScotiaStandard764$57,08343.8-30.0%
95526BridgevilleStandard745$39,583187.3214.3%
95537Fields LandingPO Box532$78,6860.2309.2%
95564SamoaStandard444$78,7503.4-11.2%
95554Myers FlatStandard368$33,12536.613.2%
95558PetroliaStandard230$51,719187.1-36.1%
95555OrickStandard216$39,58378.1-34.3%
95545HoneydewPO Box1940.096.0%
95550KorbelStandard140$104,063179.9-48.0%
95571WeottPO Box10422.4-31.6%
95569RedcrestStandard99119.1-64.3%
95514BlocksburgStandard8596.4-50.0%
95511AlderpointStandard7156.3-84.3%
95559PhillipsvillePO Box411.1-60.2%
95534CuttenPO Box0.0
95502EurekaPO Box0.0
95518ArcataPO Box0.0

Adjacent & Nearby Counties