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The Commemorative
Quarter for
The Commemorative Quarter for Oregon

The 2000 Census showed that Multnomah County had a population of 660,486 people. This represented 19.3% of the total population of Oregon, making it the state's most populous county (out of 36 counties).

From the Census Estimates for 2009<1>, Multnomah had a population of 726,855 people. This is an increase of 10.05% 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
2010735,334+11.33%+1.17% since 2009
2009726,855+10.05%+2.01% since 2008
2008712,539+7.88%+2.22% since 2007
2007697,048+5.54%+2.1% since 2006
2006682,732+3.37%+1.32% since 2005
2005673,823+2.02%+0.32% since 2004
2004671,704+1.7%-1.01% since 2003
2003678,549+2.73%+0.32% since 2002
2002676,417+2.41%+1.02% since 2001
2001669,591+1.38%+1.38% since 2000
2000660,486The Last Census

Multnomah County had 288,561 Housing Units<2> at the time of the 2000 Census.

The 2000 Census shows that Multnomah County has a total area<3> of 465.7 square miles [1,206 km²]. Of this total, 435.2 square miles [1,127 km²] of the area is land, with the balance (6.53%) being water (30.42 square miles [78.8 km²]).

Using the above population and land area values, Multnomah County had a population density of 1,517 people per square mile [585 people/km²], making it the most densely populated county in Oregon.

US Census QuickFacts

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

Click here for the Multnomah County QuickFact (QF-41051).

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

(2009 Est)
(2000 Census)
Change in

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

(2009 Est.)
(2000 Census)
Change in
ClackamasQF-41005   SE386,143338,39114.11%
ColumbiaQF-41009   NW49,59243,56013.85%
Hood RiverQF-41027   E21,88320,4117.21%
WashingtonQF-41067   W537,318445,34220.65%
Clark (WA)QF-53011   N432,002345,23825.13%
Skamania (WA)QF-53059   NE10,8949,87210.35%

The Columbia River runs along the northern border of the county.

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U.S. Census Bureau
Census QuickFact for Multnomah 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 Multnomah. 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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