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The 2000 Census showed that Sweetwater County had a population of 37,613 people. This represented 7.62% of the total population of Wyoming, making it the state's 3rd most populous county (out of 23 counties).

From the Census Estimates for 2009<1>, Sweetwater had a population of 41,226 people. This is an increase of 9.61% 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
201043,806+16.47%+6.26% since 2009
200941,226+9.61%+3.21% since 2008
200839,942+6.19%+1.58% since 2007
200739,320+4.54%+3.62% since 2006
200637,948+0.89%+1.83% since 2005
200537,266-0.92%+1.12% since 2004
200436,854-2.02%+0.81% since 2003
200336,559-2.8%-0.74% since 2002
200236,831-2.08%+0.72% since 2001
200136,566-2.78%-2.78% since 2000
200037,613The Last Census

Sweetwater County had 15,921 Housing Units<2> at the time of the 2000 Census.

The 2000 Census shows that Sweetwater County has a total area<3> of 10,491 square miles [27,171 km²]. Of this total, only a minor amount of that area is covered by water (65.9 square miles [170.6 km²]).

Using the above population and land area values, Sweetwater County had a population density of 3.61 people per square mile [1.39 people/km²], making it the state's 11th 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 Sweetwater County is available. The QuickFact also contains a comparison between Sweetwater and the state of Wyoming.

Click here for the Sweetwater County QuickFact (QF-56037).

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

(2009 Est)
(2000 Census)
Change in
Rock SpringsQF-566723520,90518,70811.74%
Green RiverQF-563374012,41111,8085.11%

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

(2009 Est.)
(2000 Census)
Change in
Moffat (CO)QF-08081   SE13,98013,1846.04%
Daggett (UT)QF-49009   S9419212.17%
Summit (UT)QF-49043   SW36,96929,73624.32%
CarbonQF-56007   E15,72015,6390.52%
FremontQF-56013   N38,71935,8048.14%
LincolnQF-56023   NW16,99514,57316.62%
SubletteQF-56035   NW8,7925,92048.51%
UintaQF-56041   W20,92719,7426%

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U.S. Census Bureau
Census QuickFact for Sweetwater 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 Sweetwater. 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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