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The Commemorative
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The Commemorative Quarter for Missouri

The 2000 Census showed that Clay County had a population of 184,006 people. This represented 3.29% of the total population of Missouri, making it the state's 6th most populous county (out of 115 counties).

From the Census Estimates for 2009<1>, Clay had a population of 228,358 people. This is an increase of 24.1% since the 2000 Census.

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
2010221,939+20.62%-2.81% since 2009
2009228,358+24.1%+2.23% since 2008
2008223,370+21.39%+2.35% since 2007
2007218,244+18.61%+2.75% since 2006
2006212,394+15.43%+3.3% since 2005
2005205,614+11.74%+2.46% since 2004
2004200,686+9.06%+2.19% since 2003
2003196,380+6.72%+1.72% since 2002
2002193,068+4.92%+2.03% since 2001
2001189,229+2.84%+2.84% since 2000
2000184,006The Last Census

Clay County had 76,230 Housing Units<2> at the time of the 2000 Census.

The 2000 Census shows that Clay County has a total area<3> of 408.9 square miles [1,058 km²]. Of this total, 396.3 square miles [1,026 km²] of the area is land, with the balance (3.06%) being water (12.52 square miles [32.41 km²]).

Using the above population and land area values, Clay County had a population density of 464.3 people per square mile [179.2 people/km²], making it the state's 4th most densely populated county (out of 115 counties).

US Census QuickFacts

The Census Bureau has created documents containing demographic information that are called QuickFacts. A QuickFact that is specific to Clay County is available. The QuickFact also contains a comparison between Clay and the state of Missouri.

Click here for the Clay County QuickFact (QF-29047).

Below are some of the communities that are located in Clay County:

(2009 Est)
(2000 Census)
Change in
Excelsior SpringsQF-292308612,57510,84715.93%

Below are the counties that adjoin and form the boundaries of Clay County. A link to their specific Census QuickFact has been provided.

(2009 Est.)
(2000 Census)
Change in
Wyandotte (KS)QF-20209   SW155,085157,882-1.77%
ClintonQF-29049   N21,00218,97910.66%
JacksonQF-29095   S705,708654,8807.76%
PlatteQF-29165   W90,68873,78122.92%
RayQF-29177   E23,35823,354---

Other Roadside Stops ...

About Missouri

Cities, Towns and Villages of Missouri

Off-the-Road Links ...

U.S. Census Bureau
Census QuickFact for Clay County

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>A Housing Unit is a broad term for those places where people live (whether occupied or temporarily vacant), such as a house, an apartment, a mobile home, or an area that is considered as a separate living quarter. Separate living quarters (consisting of one or more rooms) are considered to be those places where people live, sleep and eat separately from others and that have access to the outside (either directly or by a shared hallway).

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<3>The area value has been supplied by the US Census Bureau and it can be different than the geographic boundaries of Clay. The value given by the Census Bureau reflects their statistical (or sampling) requirements.

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<4>All Quarter-dollar coin images from the United States Mint.

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