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The Commemorative
Quarter for
South Dakota
The Commemorative Quarter for South Dakota

The 2000 Census showed that Dewey County had a population of 5,972 people. This represented 0.79% of the total population of South Dakota, making it the state's 32nd most populous county (out of 66 counties).

From the Census Estimates for 2009<1>, Dewey had a population of 5,969 people.

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
20105,301-11.24%-11.19% since 2009
20085,915-0.95%-1.22% since 2007
20075,988+0.27%-1.07% since 2006
20066,053+1.36%-0.92% since 2005
20056,109+2.29%+0.41% since 2004
20046,084+1.88%-0.69% since 2003
20036,126+2.58%+1.59% since 2002
20016,030+0.97%+0.97% since 2000
20005,972The Last Census

Dewey County had 2,133 Housing Units<2> at the time of the 2000 Census.

The 2000 Census shows that Dewey County has a total area<3> of 2,445 square miles [6,334 km²]. Of this total, 2,302 square miles [5,963 km²] of the area is land, with the balance (5.85%) being water (143 square miles [370.4 km²]).

Using the above population and land area values, Dewey County had a population density of 2.59 people per square mile [1 people/km²], making it the state's 54th most densely populated county (out of 66 counties).

US Census QuickFacts

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

Click here for the Dewey County QuickFact (QF-46041).

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

(2009 Est)
(2000 Census)
Change in

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

(2009 Est.)
(2000 Census)
Change in
CorsonQF-46031   N4,0934,181-2.1%
PotterQF-46107   E2,0532,693-23.77%
StanleyQF-46117   S2,7922,7720.72%
SullyQF-46119   SE1,3481,556-13.37%
WalworthQF-46129   NE5,2285,974-12.49%
ZiebachQF-46137   SW2,5522,5191.31%

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U.S. Census Bureau
Census QuickFact for Dewey 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 Dewey. 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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