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The Commemorative
Quarter for
The Commemorative Quarter for Iowa

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

The community of Primghar is the Seat for O'Brien County.

O'Brien County was founded January 15, 1851 and was created by taking area from CherokeeCounty.

From the Census Estimates for 2009, <1> O'Brien had a population of 13,928 people. This is a decrease of 7.77% since the last Census (which gave a population of 15,102 people in 2000).

At the time of the 2000 Census, O'Brien represented 0.52% of the total population of Iowa, making it the state's 54th 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
201014,398-4.66%+3.37% since 2009
200913,928-7.77%+0.22% since 2008
200813,898-7.97%-0.98% since 2007
200015,102The Last Census

More information can be found on the O'Brien County Census Page for O'Brien County.


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

Community 2009
(2009vs. 2000)
Sheldon   4,8384,9141.55% decrease  
Hartley   1,4971,73313.62% decrease  
Sanborn   1,3081,3533.33% decrease  
Paullina   9811,12412.72% decrease  
Primghar   8108919.09% decrease  

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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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