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The Commemorative
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The Commemorative Quarter for Washington

The 2000 Census showed that Jefferson County had a population of 25,953 people. This represented 0.44% of the total population of Washington, making it the state's 27th most populous county (out of 39 counties).

From the Census Estimates for 2009<1>, Jefferson had a population of 29,676 people. This is an increase of 14.35% 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
201029,872+15.1%+0.66% since 2009
200929,676+14.35%+0.28% since 2008
200829,592+14.02%+1.09% since 2007
200729,273+12.79%+0.44% since 2006
200629,144+12.3%+2.51% since 2005
200528,430+9.54%+1.95% since 2004
200427,886+7.45%+1.25% since 2003
200327,542+6.12%+1.32% since 2002
200227,182+4.74%+1.29% since 2001
200126,836+3.4%+3.4% since 2000
200025,953The Last Census

Jefferson County had 14,144 Housing Units<2> at the time of the 2000 Census.

The 2000 Census shows that Jefferson County has a total area<3> of 2,183 square miles [5,655 km²]. Of this total, 1,814 square miles [4,698 km²] of the area is land, with the balance (16.91%) being water (369.3 square miles [956 km²]).

Using the above population and land area values, Jefferson County had a population density of 14.31 people per square mile [5.52 people/km²], making it the state's 30th most densely populated county (out of 39 counties).

US Census QuickFacts

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

Click here for the Jefferson County QuickFact (QF-53031).

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

(2009 Est.)
(2000 Census)
Change in
ClallamQF-53009   NW71,41364,52510.67%
Grays HarborQF-53027   SW71,79767,1946.85%
IslandQF-53029   NE81,05471,55813.27%
KitsapQF-53035   SE240,862231,9693.83%
MasonQF-53045   S58,01649,40517.43%

The western boundary of the county is on the Pacific Ocean and on the east is Pudget Sound.

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U.S. Census Bureau
Census QuickFact for Jefferson 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.

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<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).

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

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

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