Data Last Updated: July 1, 2025

Humboldt County, CA ZIP Codes

ZIP Codes: Shows how many general ZIP Codes, PO Boxes, Unique (Business), and Multi County ZIP Codes are associated with Humboldt, CA.	39 ZIP Codes (29 General, 9 PO Box, 0 Unique, & 1 Multi County) [More Details]
Area Codes: The Telephone Area Codes that are associated with Humboldt, CA. Area Codes are used in the North American Numbering Plan (NANP) to facilitate phone routing. There are approximately 350 area codes in use in the United States.	369, 707, 530
Timezone: Time zone designation within the U.S. Please note that not all areas in the U.S. observe daylight saving time which can affect actual local time for this city. There are 7 standard time zones which are, from west to east: Hawaii-Aleutian, Alaska, Pacific, Mountain, Central, Eastern, Atlantic. Also included in U.S. Territories are Samoa, Guam and Palau.	Pacific
Local Time: The current local time for each timezone. If more than 1 time zone for this area, all local times will be shown. Counties can cross timezones, so more than 1 may be shown.	12:00:00 AM
Population: The population of Humboldt, CA from the U.S. Census 2020. Included are U.S. Citizens, permanent residents, temporary migrants, and undocumented individuals. The total population represents people who live in the city, not just those present while the Census was being completed.	136,463 [More Details]
FIPS: FIPS stands for Federal Information Processing Standards, which are a set of publicly announced standards for computer systems. A county FIPS code is a unique numeric identifier for a county in the United States, assigned by the National Institute of Standards and Technology (NIST). County FIPS codes have five digits, with the first two digits identifying the state and the last 3 indicating the county.	06023
CBSA: A Core Based Statistical Area (CBSA) is the recognized term for a region that functions around an urban core with a population of at least 10,000 people, according to the standards set by the Office of Management and Budget (OMB) in 2000. A CBSA is divided into two subsets: Metro and Micro, and these classifications are determined by population density. A Micro area is identified by a population ranging between 10,000 to 50,000, while a Metro area is defined as having a population that exceeds 50,000.	Eureka-Arcata, CA
Land Area: The approximate amount of land area covered by Humboldt, CA in square miles. The Land Area provided by the Census Bureau is based on geographic boundaries that include the mainland, islands, inland, coastal, Great Lakes, and territorial waters associated with each city.	3,568 square miles
Water Area: The approximate amount of water area covered by Humboldt, CA in square miles. Calculations by the Census Bureau for Water Area take into account inland bodies of water, coastal regions, Great Lakes, and territorial sea waters. This encompasses features such as lakes, reservoirs, rivers, and coastal water bodies.	484 square miles
Coordinates: The latitude/longitude centroid coordinates for Humboldt County, CA.	-123.875629, 40.699298
Quick Link: Copy the direct link to the Humboldt, CACounty page and use anywhere you like!	https://www.zip-codes.com/county/ca-humboldt.asp

Humboldt, CA ZIP Code Boundaries

Download ZIP Code Database

Load Humboldt County, CA Map

Humboldt County, CA Covers 39 ZIP Codes

ZIP Code	Classification	City	Population	% of Population
ZIP Code 95501	General	Eureka	23,323	17.09%
ZIP Code 95502	P.O. Box	Eureka	0	0.00%
ZIP Code 95503	General	Eureka	24,488	17.94%
ZIP Code 95511	General	Alderpoint	268	0.20%
ZIP Code 95514	General	Blocksburg	228	0.17%
ZIP Code 95518	P.O. Box	Arcata	0	0.00%
ZIP Code 95519	General	Mckinleyville	18,421	13.50%
ZIP Code 95521	General	Arcata	21,581	15.81%
ZIP Code 95524	General	Bayside	1,691	1.24%
ZIP Code 95525	General	Blue Lake	1,701	1.25%
ZIP Code 95526	General	Bridgeville	520	0.38%
ZIP Code 95528	General	Carlotta	996	0.73%
ZIP Code 95534	P.O. Box	Cutten	0	0.00%
ZIP Code 95536	General	Ferndale	2,753	2.02%
ZIP Code 95537	P.O. Box	Fields Landing	313	0.23%
ZIP Code 95540	General	Fortuna	14,055	10.30%
ZIP Code 95542	General	Garberville	2,519	1.85%
ZIP Code 95545	P.O. Box	Honeydew	170	0.12%
ZIP Code 95546	General	Hoopa	3,641	2.67%
ZIP Code 95547	General	Hydesville	1,270	0.93%
ZIP Code 95549	General	Kneeland	898	0.66%
ZIP Code 95550	General	Korbel	151	0.11%
ZIP Code 95551	General	Loleta	1,871	1.37%
ZIP Code 95552 *	General	Mad River	552	--
ZIP Code 95553	P.O. Box	Miranda	1,054	0.77%
ZIP Code 95554	General	Myers Flat	297	0.22%
ZIP Code 95555	General	Orick	415	0.30%
ZIP Code 95556	P.O. Box	Orleans	650	0.48%
ZIP Code 95558	General	Petrolia	548	0.40%
ZIP Code 95559	P.O. Box	Phillipsville	163	0.12%
ZIP Code 95560	General	Redway	1,548	1.13%
ZIP Code 95562	General	Rio Dell	3,475	2.55%
ZIP Code 95564	General	Samoa	438	0.32%
ZIP Code 95565	General	Scotia	875	0.64%
ZIP Code 95569	General	Redcrest	211	0.15%
ZIP Code 95570	General	Trinidad	2,543	1.86%
ZIP Code 95571	P.O. Box	Weott	297	0.22%
ZIP Code 95573	General	Willow Creek	1,750	1.28%
ZIP Code 95589	General	Whitethorn	1,648	1.21%

* Indicates a Multi County ZIP Code. These ZIP Codes partially cross over into Humboldt, CA, but will mostly cover area in a different County. Not included in % of Population calculations.

Important Humboldt, CA Information

Humboldt County, CA Covers 39 ZIP Codes. This includes 29 General ZIP Codes, 9 PO Box ZIP Codes, and 0 Unique (reserved for Business and Volume Mail Receivers). There is also 1 Multi County ZIP Code in this area. This record is assigned to a different county, but it does partially cover area in Humboldt County.

The population for Humboldt County is 136,463, according to the U.S. Census. Population Density is 38.25 persons per square mile. With 62,120 Housing Units, the Average Household Size is 2.34 persons. There are 56,422 Family Households with an Average Family Size of 3.33 persons. 4.98% of the population is without Health Insurance. The 53.16% Employment Rate is 6.64% above the national average of 59.8%.93,495 people aged 25+ have some educational achievement, with 32.09% (or 29,998 people) having attained a Bachelor's Degree or higher.More Demographics are available below.

There are 3 area codes serving this area including369, 707 and 530. Humboldt is also located in the Pacific timezone and the current local time is shown above.

Humboldt is part of the Eureka-Arcata, CA Core Based Statistical Area (CBSA). Its CBSA Code is 21700.It is classified as a micro area, which means it has an urban core of at least 10,000 but less then 50,000 people.

CBSAs are defined by the OMB as geographic areas that have at least one core with a population of 10,000 or more and adjacent territory with a high degree of social and economic integration. CBSA codes are commonly used to accurately file Medicare claims and to verify applicable incentives using a patient's ZIP Code.

ZIP Codes in Humboldt, CA have 50,721 Residential mailboxes and 3,898 Business mailboxes.There are 3,224 businesses with a total of 34,140 employees. That is an average of 10.6 employees per business. Annual payroll for these businesses is $1,624,728,000. Other Demographics

Humboldt County Demographic Profile

Population & People

Total Population

136,463

Income

Median Household Income

$61,135

Housing

Total Housing Units

62,120

Health

Without Healthcare Coverage

4.98%

Business & Economy

Total Businesses

3,224

Families

Total Households

56,422

Employment

Employment Rate

53.16%

Education

Bachelor's Degree or Higher

32.09%

Total Population: Total number of people from the 2020 U.S. Census for Humboldt, CA. This reflects the exact count of this area at that point in time, not future estimates, regardless of citizenship or immigration status. It is intended to count all persons living within the geographic area, not just those present on the day of the census.	136,463
Current Population Estimate: This field gives the estimated household population for All ZIP Codes in Humboldt, CA. This is derived from known delivery information, household occupancy rates, household size, and more to come up with an accurate estimation for the current population. IMPORTANT: This does not include population totals for persons in nursing homes, correctional facilities, or other institutions. This is an estimation of the household population based on US Postal Service delivery information.	118,084
Total Households: Total number of Households from the 2020 U.S. Census for Humboldt, CA. A Household includes everyone living in a residential housing unit. This includes families, roommates in a single residence, or a person living alone.	56,422
Total Housing Units: The total number of Housing Units is the number of occupied units + the number of vacant units. Ownership is defined by whether the unit is occupied by an owner or by a tenant. Owner occupancy means that the owner lives in the unit. This value comes from the 2020 U.S. Census and is not a projection or estimate.	62,120
Average Household Size: The Average Household Size, is obtained by dividing the number of people in Households (excluding those in group quarters, nursing home, prisons, and dorm rooms) by the number of Households. A Household includes everyone living in a residential unit. Those who do not live in a household are classified as living in group accommodation. This value is an estimate from the U.S. Census ACS (American Community Survey) and is updated yearly.	2.34
Average Family Size: Average Family Size is calculated by dividing the number of people in a Family Household by the number of Family Households. The U.S. Census Bureau defines family households as households consisting of two or more individuals who are related by birth, marriage, or adoption. They also may include other unrelated people. Non-family households consist of people who live alone or who share their residence with unrelated individuals. The Average Family Size only looks at the households classified as Family Households. This value is an estimate from the U.S. Census ACS (American Community Survey) and is updated yearly.	3.33

Other Humboldt Demographics

# Residential Mailboxes: The number of active residential delivery mailboxes and centralized units. This excludes PO Boxes and all other contract box types.	50,721
# Business Mailboxes: The number of active business delivery mailboxes and centralized units. This excludes PO Boxes and all other contract box types.	3,898
Total Delivery Receptacles: The total number of delivery receptacles. This includes curb side mailboxes, centralized units, PO Boxes, NDCBU, and contract boxes. This count is for Residential and Business combined.	87,185
Single Family Delivery Units: Total count of single family mail delivery receptacles; generally analogous to homes.	30,068
Multi Family Delivery Units: Total count of multifamily mail delivery receptacles; generally analogous to apartments.	2,485

# of Businesses: The total number of Business Establishments. Data taken from Business Census 2023.	3,224
1st Quarter Payroll: The total payroll for the first quarter. Data taken from Business Census 2023.	$382,352,000
Annual Payroll: The total annual payroll . Data taken from Business Census 2023.	$1,624,728,000
# of Employees: The total number of employees for all ZIP Codes in this City. Data taken from Business Census 2023.	34,140

Sum of all ZIP Codes assigned Humboldt, CA as their primary County.

References

U.S. Postal Service [Last Updated: 7/1/2025], https://www.usps.com
ZIP-Codes.com Internal Data Creation [Last Updated: 7/1/2025], https://www.zip-codes.com
U.S. Geological Survey [Updated as needed], https://www.usgs.gov
U.S. Census [Updated Yearly], https://www.census.gov
U.S. Census 2020 [Decennial] [Last Updated: 5/25/2023], https://www.census.gov