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The Commemorative
Quarter for
The Commemorative Quarter for Kansas

The 2000 Census showed that Lyon County had a population of 35,935 people. This represented 1.34% of the total population of Kansas, making it the state's 15th most populous county (out of 105 counties).

From the Census Estimates for 2009<1>, Lyon had a population of 33,601 people. This is a decrease of 6.5% 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
201033,690-6.25%+0.26% since 2009
200933,601-6.5%-4.86% since 2008
200835,318-1.72%-1.13% since 2007
200735,720-0.6%+0.41% since 2006
200635,575-1%-0.39% since 2005
200535,715-0.61%-0.41% since 2004
200435,861-0.21%+0.35% since 2003
200235,749-0.52%-0.72% since 2001
200136,009+0.21%+0.21% since 2000
200035,935The Last Census

Lyon County had 14,757 Housing Units<2> at the time of the 2000 Census.

The 2000 Census shows that Lyon County has a total area<3> of 855 square miles [2,214 km²]. Of this total, only a minor amount of that area is covered by water (4.27 square miles [11.05 km²]).

Using the above population and land area values, Lyon County had a population density of 42.23 people per square mile [16.31 people/km²], making it the state's 16th most densely populated county (out of 105 counties).

US Census QuickFacts

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

Click here for the Lyon County QuickFact (QF-20111).

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

(2009 Est)
(2000 Census)
Change in

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

(2009 Est.)
(2000 Census)
Change in
ChaseQF-20017   W2,7983,030-7.66%
CoffeyQF-20031   SE8,4368,865-4.84%
GreenwoodQF-20073   S6,6667,673-13.12%
MorrisQF-20127   NW5,9946,104-1.8%
OsageQF-20139   NE16,10416,712-3.64%
WabaunseeQF-20197   N6,8466,885-0.57%

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U.S. Census Bureau
Census QuickFact for Lyon 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 Lyon. 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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