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The 2000 Census showed that Atchison County had a population of 6,430 people. This represented 0.11% of the total population of Missouri, making it the state's 106th most populous county (out of 115 counties).

From the Census Estimates for 2009<1>, Atchison had a population of 6,036 people. This is a decrease of 6.13% 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
20105,685-11.59%-5.82% since 2009
20096,036-6.13%+0.35% since 2008
20086,015-6.45%-1.34% since 2007
20076,097-5.18%+0.59% since 2006
20066,061-5.74%-1.96% since 2005
20056,182-3.86%-1.26% since 2004
20046,261-2.63%-0.24% since 2003
20036,276-2.4%+0.4% since 2002
20026,251-2.78%-2.07% since 2001
20016,383-0.73%-0.73% since 2000
20006,430The Last Census

Atchison County had 3,103 Housing Units<2> at the time of the 2000 Census.

The 2000 Census shows that Atchison County has a total area<3> of 547 square miles [1,417 km²]. Of this total, only a minor amount of that area is covered by water (2.64 square miles [6.85 km²]).

Using the above population and land area values, Atchison County had a population density of 11.8 people per square mile [4.56 people/km²], making it the state's 108th 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 Atchison County is available. The QuickFact also contains a comparison between Atchison and the state of Missouri.

Click here for the Atchison County QuickFact (QF-29005).

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

(2009 Est)
(2000 Census)
Change in

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

(2009 Est.)
(2000 Census)
Change in
Fremont (IA)QF-19071   N7,3458,010-8.3%
Page (IA)QF-19145   NE15,26016,976-10.11%
HoltQF-29087   SE4,8685,351-9.03%
NodawayQF-29147   E22,13021,9120.99%
Nemaha (NE)QF-31127   W6,8567,576-9.5%
Otoe (NE)QF-31131   NW15,21415,396-1.18%
Richardson (NE)QF-31147   SW8,1259,531-14.75%

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U.S. Census Bureau
Census QuickFact for Atchison 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 Atchison. 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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