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The 2000 Census showed that Big Horn County had a population of 11,461 people. This represented 2.32% of the total population of Wyoming, making it the state's 15th most populous county (out of 23 counties).

From the Census Estimates for 2009<1>, Big Horn had a population of 11,581 people. This is an increase of 1.05% 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
201011,668+1.81%+0.75% since 2009
200911,581+1.05%+1.22% since 2008
200811,441-0.17%+0.58% since 2007
200711,375-0.75%+1.16% since 2006
200611,245-1.88%+0.24% since 2005
200511,218-2.12%-0.37% since 2004
200411,260-1.75%+1.42% since 2003
200311,102-3.13%-0.75% since 2002
200211,186-2.4%-0.42% since 2001
200111,233-1.99%-1.99% since 2000
200011,461The Last Census

Big Horn County had 5,105 Housing Units<2> at the time of the 2000 Census.

The 2000 Census shows that Big Horn County has a total area<3> of 3,158 square miles [8,181 km²]. Of this total, only a minor amount of that area is covered by water (21.97 square miles [56.9 km²]).

Using the above population and land area values, Big Horn County had a population density of 3.65 people per square mile [1.41 people/km²], making it the state's 15th most densely populated county (out of 23 counties).

US Census QuickFacts

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

Click here for the Big Horn County QuickFact (QF-56003).

Below are some of the communities that are located in Big Horn County:

(2009 Est)
(2000 Census)
Change in

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

(2009 Est.)
(2000 Census)
Change in
Big Horn (MT)QF-30003   N13,01512,6712.71%
Carbon (MT)QF-30009   NW9,7569,5522.14%
JohnsonQF-56019   SE8,5317,07520.58%
ParkQF-56029   W27,97625,7868.49%
SheridanQF-56033   E29,16326,5609.8%
WashakieQF-56043   SE7,9118,289-4.56%

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U.S. Census Bureau
Census QuickFact for Big Horn 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 Big Horn. 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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