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The Commemorative
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The Commemorative Quarter for South Dakota

The 2000 Census showed that Day County had a population of 6,267 people. This represented 0.83% of the total population of South Dakota, making it the state's 30th most populous county (out of 66 counties).

From the Census Estimates for 2009<1>, Day had a population of 5,509 people. This is a decrease of 12.1% 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.

YearPopulationChange
Since 2000
Year-to-Year Change
20105,710-8.89%+3.65% since 2009
20095,509-12.1%-0.29% since 2008
20085,525-11.84%-2.16% since 2007
20075,647-9.89%-1.1% since 2006
20065,710-8.89%-1.48% since 2005
20055,796-7.52%-0.45% since 2004
20045,822-7.1%-1.15% since 2003
20035,890-6.02%-2.21% since 2002
20026,023-3.89%-1.12% since 2001
20016,091-2.81%-2.81% since 2000
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20006,267The Last Census

Day County had 3,618 Housing Units<2> at the time of the 2000 Census.

The 2000 Census shows that Day County has a total area<3> of 1,091 square miles [2,826 km²]. Of this total, 1,028 square miles [2,663 km²] of the area is land, with the balance (5.74%) being water (62.6 square miles [162.2 km²]).

Using the above population and land area values, Day County had a population density of 6.09 people per square mile [2.35 people/km²], making it the state's 31st 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 Day County is available. The QuickFact also contains a comparison between Day and the state of South Dakota.

Click here for the Day County QuickFact (QF-46037).

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

CommunityCensus
QuickFact
Population
(2009 Est)
Population
(2000 Census)
Change in
  Population

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

CountyCensus
QuickFact
DirectionPopulation
(2009 Est.)
Population
(2000 Census)
Change in
Population
BrownQF-46013   W35,20435,460-0.72%
ClarkQF-46025   S3,4314,143-17.19%
CodingtonQF-46029   SE26,16825,8971.05%
GrantQF-46051   E7,0687,847-9.93%
MarshallQF-46091   N4,1604,576-9.09%
RobertsQF-46109   NE9,93310,016-0.83%
SpinkQF-46115   SW6,5547,454-12.07%

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About South Dakota

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U.S. Census Bureau
Census QuickFact for Day 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 Day. 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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