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The Commemorative
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South Dakota
The Commemorative Quarter for South Dakota

Time Zone: Pennington County lies in the Mountain Time Zone (MST/MDT) and observes daylight saving time.

The community of Rapid City is the Seat for Pennington County.

Pennington County was founded in 1875.

From the Census Estimates for 2009, <1> Pennington had a population of 100,850 people. This is an increase of 13.87% since the last Census (which gave a population of 88,565 people in 2000).

At the time of the 2000 Census, Pennington represented 11.73% of the total population of South Dakota, making it the state's 2nd most populous county (out of 66 counties).

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
2010100,948+13.98%+0.1% since 2009
2009100,850+13.87%+2.03% since 2008
200898,845+11.61%+2.41% since 2007
200088,565The Last Census

More information can be found on the Pennington County Census Page for Pennington County.


Below are some of the communities located in Pennington County (for more communities, please visit our Nearby Page for Pennington County):

Community 2009
(2009vs. 2000)
Rapid City   67,10759,60712.58% increase  
Central Pennington   14,31213,3697.05% increase  
Mount Rushmore   6,9526,3619.29% increase  
Box Elder   4,2712,84150.3% increase  
West Pennington   1,9221,55323.76% increase  

Websites for Pennington County

Official Website:   www.co.pennington.sd.us/

If you know of a history or genealogy society whose interest includes Pennington County, would you please send us the URL for their website? We would like to add their link to our Gazetteer. To contact us, please visit our Feedback Page.

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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>All Quarter-dollar coin images from the United States Mint.

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