Learn About
The Commemorative
Quarter for
The Commemorative Quarter for Missouri

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

The community of Clayton is the Seat for Saint Louis County.

Saint Louis County is one of the original counties of Missouri and was founded in 1812.

From the Census Estimates for 2009, <1> Saint Louis had a population of 992,408 people. This is a decrease of 2.35% since the last Census (which gave a population of 1,016,315 people in 2000).

At the time of the 2000 Census, Saint Louis represented 18.16% of the total population of Missouri, making it the state's most populous county (out of 115 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
2010998,954-1.71%+0.66% since 2009
2008992,331-2.36%-0.14% since 2007
20001,016,315The Last Census

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


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

Community 2009
(2009vs. 2000)
Florissant   50,55350,4970.11% increase  
Chesterfield   46,09646,8021.51% decrease  
Wildwood   34,20932,8844.03% increase  
Ballwin   30,09531,2833.8% decrease  
Kirkwood   26,80827,3241.89% decrease  

Websites for Saint Louis County

Official Website:   www.co.st-louis.mo.us/

If you know of a history or genealogy society whose interest includes Saint Louis 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.

Other Roadside Stops ...

About Missouri

Index of Cities, Towns and Villages for Missouri

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.

- Return to Citation

<2>All Quarter-dollar coin images from the United States Mint.

- Return to Citation