Learn About
The Commemorative
Quarter for
The Commemorative Quarter for California

The 2000 Census showed that Humboldt County had a population of 126,518 people. This represented 0.37% of the total population of California, making it the state's 33rd most populous county (out of 58 counties).

From the Census Estimates for 2009<1>, Humboldt had a population of 129,623 people. This is an increase of 2.45% since the 2000 Census.

The following table shows the recent changes in population. Other than 2000, the population counts have been estimated by the Census Bureau.

Since 2000
Year-to-Year Change
2010134,623+6.41%+3.86% since 2009
2009129,623+2.45%+0.6% since 2008
2008128,852+1.84%+0.22% since 2007
2007128,564+1.62%-0.36% since 2006
2005128,943+1.92%+0.19% since 2004
2004128,694+1.72%+0.37% since 2003
2003128,219+1.34%+0.34% since 2002
2002127,779+1%+0.61% since 2001
2001127,002+0.38%+0.38% since 2000
2000126,518The Last Census

Humboldt County had 55,912 Housing Units<2> at the time of the 2000 Census.

The 2000 Census shows that Humboldt County has a total area<3> of 4,052 square miles [10,495 km²]. Of this total, 3,572 square miles [9,252 km²] of the area is land, with the balance (11.84%) being water (479.7 square miles [1,242 km²]).

Using the above population and land area values, Humboldt County had a population density of 35.41 people per square mile [13.67 people/km²], making it the state's 41st most densely populated county (out of 58 counties).

US Census QuickFacts

The Census Bureau has created documents containing demographic information that are called QuickFacts. A QuickFact that is specific to Humboldt County is available. The QuickFact also contains a comparison between Humboldt and the state of California.

Click here for the Humboldt County QuickFact (QF-06023).

Below are some of the communities that are located in Humboldt County:

(2009 Est)
(2000 Census)
Change in

Below are the counties that adjoin and form the boundaries of Humboldt County. A link to their specific Census QuickFact has been provided.

(2009 Est.)
(2000 Census)
Change in
Del NorteQF-06015   N29,11427,5075.84%
MendocinoQF-06045   S86,04086,265-0.26%
SiskiyouQF-06093   NE44,63444,3010.75%
TrinityQF-06105   E14,16513,0228.78%

The western boundary of the county is on the Pacific Ocean.

Other Roadside Stops ...

About California

Visit our Community Index for California

Off-the-Road Links ...

U.S. Census Bureau
Census QuickFact for Humboldt County

Footnotes ...

<1>On a yearly basis, the US Census Bureau creates an estimate of the county's population. Keep in mind that this is an estimate and not an actual count. The last physical count was the 2000 Census and the next count will be for the 2010 Census.

- Return to Citation

<2>A Housing Unit is a broad term for those places where people live (whether occupied or temporarily vacant), such as a house, an apartment, a mobile home, or an area that is considered as a separate living quarter. Separate living quarters (consisting of one or more rooms) are considered to be those places where people live, sleep and eat separately from others and that have access to the outside (either directly or by a shared hallway).

- Return to Citation

<3>The area value has been supplied by the US Census Bureau and it can be different than the geographic boundaries of Humboldt. The value given by the Census Bureau reflects their statistical (or sampling) requirements.

- Return to Citation

<4>All Quarter-dollar coin images from the United States Mint.

- Return to Citation