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The Commemorative
Quarter for
The Commemorative Quarter for Kansas

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

The community of Olathe is the Seat for Johnson County.

Johnson County is one of the original counties of Kansas and was founded August 25, 1855.

From the Census Estimates for 2009, <1> Johnson had a population of 542,737 people. This is an increase of 20.32% since the last Census (which gave a population of 451,086 people in 2000).

At the time of the 2000 Census, Johnson represented 16.78% of the total population of Kansas, making it the state's 2nd most populous county (out of 105 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
2010544,179+20.64%+0.27% since 2009
2009542,737+20.32%+1.45% since 2008
2008535,000+18.6%+1.72% since 2007
2000451,086The Last Census

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


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

Community 2009
(2009vs. 2000)
Overland Park   174,907149,08017.32% increase  
Olathe   121,96292,96231.2% increase  
Shawnee   61,71247,99628.58% increase  
Lenexa   48,08740,23819.51% increase  
Leawood   31,76627,65614.86% increase  

Websites for Johnson County

Official Website:   www.jocoks.com/

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