Learn About
The Commemorative
Quarter for
The Commemorative Quarter for Iowa

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

The community of Iowa City is the Seat for Johnson County.

Johnson County was founded December 21, 1837.

From the Census Estimates for 2009, <1> Johnson had a population of 131,005 people. This is an increase of 18.02% since the last Census (which gave a population of 111,006 people in 2000).

At the time of the 2000 Census, Johnson represented 3.79% of the total population of Iowa, making it the state's 5th 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
2010130,882+17.91%-0.09% since 2009
2009131,005+18.02%+2.23% since 2008
2008128,145+15.44%+2.08% since 2007
2000111,006The 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)
Iowa City   69,08662,22011.04% increase  
Coralville   18,82715,12324.49% increase  
North Liberty   12,4135,367131.3% increase  
Tiffin   1,88297593% increase  
Solon   1,7341,17747.32% increase  

Websites for Johnson County

Official Website:   www.johnson-county.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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