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The Commemorative
Quarter for
The Commemorative Quarter for Washington

The 2000 Census showed that San Juan County had a population of 14,077 people. This represented 0.24% of the total population of Washington, making it the state's 32nd most populous county (out of 39 counties).

From the Census Estimates for 2009<1>, San Juan had a population of 15,484 people. This is an increase of 10% 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
201015,769+12.02%+1.84% since 2009
200915,484+10%+0.14% since 2008
200815,462+9.84%+1.19% since 2007
200715,280+8.55%+0.76% since 2006
200615,164+7.72%+0.54% since 2005
200515,083+7.15%+0.47% since 2004
200415,013+6.65%+1.8% since 2003
200314,748+4.77%+0.9% since 2002
200214,616+3.83%+1.9% since 2001
200114,343+1.89%+1.89% since 2000
200014,077The Last Census

San Juan County had 9,752 Housing Units<2> at the time of the 2000 Census.

The 2000 Census shows that San Juan County has a total area<3> of 621 square miles [1,608 km²]. Of this total, 174.9 square miles [453 km²] of the area is land, with the balance (71.8%) being water (446.1 square miles [1,155 km²]).

Using the above population and land area values, San Juan County had a population density of 80.5 people per square mile [31.07 people/km²], making it the state's 11th 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 San Juan County is available. The QuickFact also contains a comparison between San Juan and the state of Washington.

Click here for the San Juan County QuickFact (QF-53055).

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

(2009 Est.)
(2000 Census)
Change in
IslandQF-53029   SE81,05471,55813.27%
SkagitQF-53057   E119,534102,97916.08%
WhatcomQF-53073   NE200,434166,81420.15%

Other Roadside Stops ...

About Washington

Index of Cities, Towns and Villages for Washington

Off-the-Road Links ...

U.S. Census Bureau
Census QuickFact for San Juan 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 San Juan. 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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