What is the population of Humboldt County?

The population of Humboldt County, CA is 134,977.

Where is Humboldt County located?

Humboldt County, CA is located at latitude 40.7050100 and longitude -123.9158200. It is in United States.

What is the area of Humboldt County?

The area of Humboldt County, CA is 10495 km².

What is the elevation of Humboldt County?

Humboldt County, CA has an elevation of 677 meters (2221 feet) above sea level.

What time zone is Humboldt County in?

Humboldt County, CA is in the America/Los_Angeles time zone.

How has the population of Humboldt County changed?

The population of Humboldt County, CA has increased from 134,623 (2010) to 134,977 (2020), a change of 0.3%.

Humboldt County, California

Humboldt County: county in California, United States

About

Humboldt County is a county located in the U.S. state of California. As of the 2010 census, the population was 134,623 and a population density of 13 people per km². After 10 years in 2020 county had an estimated population of 134,977 inhabitants. Its county seat is Eureka. The county was created 173 years ago in 1852.

Humboldt County locator map — Location of Humboldt County on California map.

County Snapshot

Humboldt County at a glance

Humboldt County currently has 15 quality-checked populated place pages linked on MapSof, making it easier to jump from the county overview into local city pages.

Browse county places

Mapped populated places

These counts use a stricter populated-place filter so the main lists stay focused on real city and town pages.

California counties

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Largest city

Eureka

Population 26,652

Quick Facts about Humboldt County

Population	134,977 (2020)
Country	United States of America
State	California (United States)
Different from	Humboldt County, Humboldt County
Area	10495 km²
Water as percent of area	11.84%
Land as percent of area	88.16%
Latitude & Longitude	40.7050,-123.9158
Named for	Alexander von Humboldt
Altitude	2,457 feet / 749 meters
Capital	Eureka
Establishment	January 01, 1853
Time Zone	America/Los_Angeles
Local time	21:05:11 (15th April 2026)
Density	13 Pop. per km² as of 2020
Population growth	0.26% (2010-2020)
Weather	43℉ Mostly Cloudy 7-days weather

Humboldt Bay and Eureka aerial view image

Geography

Humboldt County is located at 40°42'18"N 123°54'57"W (40.7050100, -123.9158200). It has 4 neighbors: Mendocino County, Trinity County, Del Norte County and Siskiyou County.

Humboldt County map

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The largest city of Humboldt County is Eureka with a population of 26,652. Other cities include, Arcata population 18,044, Fortuna population 12,107, Rio Dell population 3,363 and Ferndale population 1,362. See all Humboldt County cities & populated places.

Humboldt County Populated Places

Cities, towns, neighborhoods & other populated places in Humboldt County.

City Name	Population	Title
Eureka	26,652	City in and county seat of Humboldt County, California, United States
Arcata	18,044	City in California
McKinleyville	15,177	Census-designated place in Humboldt County, California
Fortuna	12,107	City in the United States of America
Myrtletown	4,675	Census-designated place in Humboldt County, California
Humboldt Hill	3,414	Census-designated place in Humboldt County, California
Rio Dell	3,363	City in Humboldt County, California, United States of America
Cutten	3,108	Census-designated place in Humboldt County, California
Bayview	2,510	Census-designated place in Humboldt County, California
Willow Creek	1,710	Census-designated place in Humboldt County, California
Ferndale	1,362	Town in Humboldt County, California, United States
Blue Lake	1,244	City in California
Hydesville	1,237	Census-designated place in Humboldt County, California
Redway	1,225	Census-designated place in Humboldt County, California
Trinidad	358	Seaside city in Humboldt County, California, USA

Weather

43°F

Mostly Cloudy

5 to 10 mph N Tuesday Night

Mostly cloudy, with a low around 43.

7-Day Forecast

Official website of Humboldt County

Official Website

Humboldt County has 4 neighbours.

Mendocino County county in northwestern California, United States
Trinity County county in northwestern California, United States
Del Norte County county in California, United States
Siskiyou County county in state of California, United States

Eureka

Demographics

The population of Humboldt County increased by 0.26% in 10 years.

Year	Population	% Change	Method
2010	134,623	-	census
2011	135,243	0.46%	estimation process
2012	134,572	-0.5%	estimation process
2013	134,403	-0.13%	estimation process
2014	134,494	0.07%	estimation process
2015	135,102	0.45%	estimation process
2016	136,290	0.87%	estimation process
2017	136,507	0.16%	estimation process
2018	136,244	-0.19%	estimation process
2019	135,558	-0.51%	estimation process
2020	134,977	-0.43%	estimation process

Comte de Humboldt, Comté de Humboldt, Condado de Humboldt, Condado han Humboldt, Contea di Humboldt, Gumbol'dt, Hrabstwo Humboldt, Humboldt, Humboldt Comitatus, Humboldt Kun, Humboldt Kūn, Humboldt konderria, Humboldt megye, Humboldt srjan, Khumboult, Okrug Khambolt, Quan Humboldt, Quận Humboldt, hamaboldata ka'unti, hanboruto jun, hong bao xian, mqatʿt hwmbwlt, shhrstan hwmbwlt kalyfrnya, Гумбольдт, Округ Хамболт, Хъмбоулт, Հումբոլդտ շրջան, شهرستان هومبولت، کالیفرنیا, مقاطعة هومبولت, ہمبولٹ کاؤنٹی, ہمبولٹ کاؤنٹی، کیلیفورنیا, হামবোল্ডট কাউন্টি, ハンボルト郡, 洪堡縣

People born in Humboldt County (9)

People born in Humboldt County, including politician Milton C. Garber, Chris Hesse, singer Mariee Sioux, .

More notable people

Al Simpson (American football coach) he was born in 19/07/1916
Edmund Beardsley Underwood (Governor of American Samoa) he was born in 01/03/1853
Lillian Kinkella Keil (American nurse) she was born in 17/11/1916
Marshall Brant (American baseball player) he was born in 17/09/1955
Ward Weaver III (American rapist) he was born in 06/04/1963
Gaye LeBaron (American newspaper columnist, author, teacher, and local historian) she was born in 01/01/1939

Other places with the same name (2)

Humboldt County, Nevada county in Nevada, United States with a population of 16,962 people.
Humboldt County, Iowa county in Iowa, United States with a population of 9,473 people.

California Other Counties (more counties)

County Name	Population	Title
Los Angeles County	9,943,046	County in California, United States of America
Los Angeles	3,970,219	The second most populous city in the United States and the center of the Los Angeles metropolitan area.
San Diego County	3,332,427	Founded in 1850, is one of 58 counties in the US state of California.
Orange County	3,166,857	County in California, United States
Riverside County	2,489,188	County in California, United States
San Bernardino County	2,189,183	County in California, United States
Santa Clara County	1,907,105	County in California, United States
Alameda County	1,662,323	County in California, United States
Sacramento County	1,559,146	County in California, United States
San Diego	1,422,420	The eighth most populous city in the United States and the center of the San Diego metropolitan area.
Laguna	1,370,232	A city located in Orange County, California.
Contra Costa County	1,152,333	County in California, United States
San Jose	1,013,616	The tenth most populous city in the United States and the center of the San Jose metropolitan area.
Fresno County	1,000,918	County in California, United States
Kern County	901,362	This county is located in the southern San Joaquin Valley, extending eastward over the Tehachapi Mountains to the Mojave Desert.
San Francisco County	866,606	County, coextensive with the city of San Francisco, California, United States