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The Commemorative
Quarter for
The Commemorative Quarter for Iowa

Time Zone: Polk County lies in the Central Time Zone (CST/CDT) and observes daylight saving time.

The community of Des Moines is the Seat for Polk County. Des Moines is also the capital of Iowa.

Polk County was founded January 13, 1846.

From the Census Estimates for 2009, <1> Polk had a population of 429,439 people. This is an increase of 14.64% since the last Census (which gave a population of 374,601 people in 2000).

At the time of the 2000 Census, Polk represented 12.8% of the total population of Iowa, making it the state's most populous county (out of 99 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
2010430,640+14.96%+0.28% since 2009
2009429,439+14.64%+1.55% since 2008
2008422,893+12.89%+1.59% since 2007
2000374,601The Last Census

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


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

Community 2009
(2009vs. 2000)
Des Moines   200,538198,6820.93% increase  
Ankeny   42,64827,11757.3% increase  
Johnston   15,9188,64984% increase  
Altoona   14,39710,34539.17% increase  
Pleasant Hill   8,4245,07066.2% increase  

Websites for Polk County

Official Website:   www.co.polk.ia.us/

If you know of a history or genealogy society whose interest includes Polk 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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