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The Commemorative
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The Commemorative Quarter for Washington

The 2000 Census showed that Island County had a population of 71,558 people. This represented 1.21% of the total population of Washington, making it the state's 14th most populous county (out of 39 counties).

From the Census Estimates for 2009<1>, Island had a population of 81,054 people. This is an increase of 13.27% 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
201078,506+9.71%-3.14% since 2009
200981,054+13.27%+0.26% since 2008
200780,860+13%-0.31% since 2006
200681,109+13.35%+1.71% since 2005
200579,744+11.44%+0.47% since 2004
200479,372+10.92%+3.53% since 2003
200376,666+7.14%+1.41% since 2002
200275,603+5.65%+1.94% since 2001
200174,161+3.64%+3.64% since 2000
200071,558The Last Census

Island County had 32,378 Housing Units<2> at the time of the 2000 Census.

The 2000 Census shows that Island County has a total area<3> of 517 square miles [1,340 km²]. Of this total, 208.4 square miles [539 km²] of the area is land, with the balance (59.7%) being water (309 square miles [800 km²]).

Using the above population and land area values, Island County had a population density of 343.3 people per square mile [132.6 people/km²], making it the state's 5th 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 Island County is available. The QuickFact also contains a comparison between Island and the state of Washington.

Click here for the Island County QuickFact (QF-53029).

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

(2009 Est)
(2000 Census)
Change in
Oak HarborQF-535036022,63819,79514.36%

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

(2009 Est.)
(2000 Census)
Change in
JeffersonQF-53031   SW29,67625,95314.35%
KitsapQF-53035   S240,862231,9693.83%
San JuanQF-53055   NW15,48414,07710%
SkagitQF-53057   NE119,534102,97916.08%
SnohomishQF-53061   SE694,571606,02414.61%

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U.S. Census Bureau
Census QuickFact for Island 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 Island. 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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