View source for List of counties in Wyoming

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{{Use American English|date=June 2025}}
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{{Use mdy dates|date=April 2024}}
{{Infobox subdivision type
| name             = Counties of Wyoming
| alt_name         =
| map              = {{Wyoming County Labelled Map}}
| category         =
| territory        = [[State of Wyoming]]
| start_date       =
| current_number   = 23
| number_date      =
| population_range = 2,301 ([[Niobrara County, Wyoming|Niobrara]]) – 101,783 ([[Laramie County, Wyoming|Laramie]])
| area_range       = {{Convert|2004|sqmi}} ([[Hot Springs County, Wyoming|Hot Springs]]) – {{Convert|10426|sqmi}} ([[Sweetwater County, Wyoming|Sweetwater]])
| government       = [[County government]]
| subdivision      = Cities, towns, townships, unincorporated communities, Indian reservations, [[census-designated places]]
}}
There are 23 [[County (United States)|counties]] in the [[U.S. state]] of [[Wyoming]]. There were originally five counties in the [[Wyoming Territory]]: Laramie and Carter, established in 1867; Carbon and Albany established in 1868; and Uinta, an annexed portion of Utah and Idaho, extending from Montana (including [[Yellowstone National Park|Yellowstone Park]]) to the Wyoming–Utah boundary.<ref name="wyofacts">{{cite web |url=http://wyoming.gov/general/history.asp |title=General Facts About Wyoming |access-date=July 20, 2007 |work=State of Wyoming |archive-url = https://web.archive.org/web/20070512143401/http://wyoming.gov/general/history.asp <!-- Bot retrieved archive --> |archive-date = May 12, 2007}}</ref> On July 10, 1890, Wyoming was admitted to the Union with thirteen counties in it. Ten more counties were created after statehood.<ref name="wyofacts" />

Two counties were renamed after their creation. Carter County was renamed Sweetwater County on December 1, 1869.<ref>{{cite web| url=http://wyoarchives.state.wy.us/databases/county/carter/carter.htm |title=Carter County Records |access-date=July 20, 2007 |work=Wyoming State Archives |archive-url = https://web.archive.org/web/20080503190151/http://wyoarchives.state.wy.us/databases/county/carter/carter.htm <!-- Bot retrieved archive --> |archive-date = May 3, 2008}}</ref> Pease County, formed in 1875, was renamed Johnson County in 1879.<ref name="rootsweb">{{cite web |url=http://www.rootsweb.com/~wyoming/mn-counties.htm |title=Wyoming Counties |access-date=July 20, 2007 |work=American Local History Network |publisher=RootsWeb.com}}</ref>

The [[Federal Information Processing Standard]] (FIPS) code, which is used by the United States government to uniquely identify states and counties, is provided with each entry.<ref>{{cite web|url= http://www.itl.nist.gov/fipspubs/fip6-4.htm|title= FIPS Publish 6-4|publisher= National Institute of Standards and Technology|access-date= July 20, 2007|url-status= dead|archive-url= https://web.archive.org/web/20130929074056/http://www.itl.nist.gov/fipspubs/fip6-4.htm|archive-date= September 29, 2013}}</ref> Wyoming's code is 56, which when combined with any county code would be written as 56XXX. The FIPS code for each county links to census data for that county.<ref name="epa">{{cite web |url=http://www.epa.gov/enviro/html/codes/wy.html |title=EPA County FIPS Code Listing |access-date=July 20, 2007 |work=US Environmental Protection Agency |url-status=dead |archive-url=https://web.archive.org/web/20130730055653/http://www.epa.gov/enviro/html/codes/wy.html |archive-date=July 30, 2013 }}</ref>

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==List==
{{Sticky header}}
{| class="wikitable sortable sticky-header" align="center" style="text-align: center;"
|-
! scope="col" | County
! scope="col" | FIPS code <ref name="epa" />
! scope="col" | [[County seat]]<ref name="NACO">{{cite web|url=http://www.naco.org/Template.cfm?Section=Find_a_County&Template=/cffiles/counties/state.cfm&state.cfm&statecode=WY |title=NACo - Find a county |publisher=National Association of Counties |access-date=July 20, 2007 |archive-url=https://web.archive.org/web/20070930181309/http://www.naco.org/Template.cfm?Section=Find_a_County&Template=%2Fcffiles%2Fcounties%2Fstate.cfm&state.cfm&statecode=WY |archive-date=September 30, 2007 |url-status=dead }}</ref>
! scope="col" | {{abbr|Est.|Established}}<ref name="wyofacts" />
! scope="col" | Formed from<ref name="wyofacts" />
! scope="col" | Etymology<ref>{{cite web |url=http://gowyld.net/wyoming/counties.html |title=Name Derivations of Wyoming Counties |access-date=July 20, 2007 |work=Wyoming State Library |url-status=dead |archive-url=https://web.archive.org/web/20130825095735/http://gowyld.net/wyoming/counties.html |archive-date=August 25, 2013 }}</ref>
! scope="col" | Population<ref name=2024CensusEstimate>{{cite web|url=https://www.census.gov/quickfacts/fact/table/WY/PST045219 |title=U.S. Census Bureau QuickFacts: Wyoming |publisher=[[United States Census Bureau]], Population Division |date=July 2024 |access-date=March 14, 2025 }}</ref>
! scope="col" | Area<ref name="NACO" /><ref name="2024CensusEstimate" />
! scope="col" | Map
{{Countyrow|N=56|Num=001|Name=Albany|Seat=Laramie|Data2=1868|Data3=One of the original five counties.|Data4=City of [[Albany, New York|Albany]], New York, from which early settlers hailed.|Population= 39288 | Area=4274 | Size=100px}}
{{Countyrow|N=56|Num=003|Name=Big Horn|Seat=Basin|Data2=1896|Data3=Parts of Sheridan County, Johnson County, and Fremont County. |Data4=[[Big Horn Mountains]], a [[mountain range]] extending into northern [[Wyoming]] |Population= 12084 | Area= 3137 | Size=100px}}
{{Countyrow|N=56|Num=005|Name=Campbell|Seat=Gillette|Data2=1911|Data3=Parts of Weston County and Crook County. |Data4=[[John Allen Campbell]] <small>(1835–80)</small>, first governor of the [[Wyoming Territory]] <small>(1869–75)</small> |Population= 47946 | Area= 4797 |Size=100px}}
{{Countyrow|N=56|Num=007|Name=Carbon|Seat=Rawlins|Data2=1868|Data3=One of the original five counties.|Data4=The vast coal beds in the county. |Population= 14250 | Area= 7897 |Size=100px}}
{{Countyrow|N=56|Num=009|Name=Converse|Seat=Douglas|Data2=1888|Data3=Parts of Albany County and Laramie County. |Data4=Amasa Rice Converse <small>(1842–1885)</small>, a banker and rancher from [[Cheyenne, Wyoming|Cheyenne]], Wyoming. |Population= 13766 | Area= 4255 |Size=100px}}
{{Countyrow|N=56|Num=011|Name=Crook|Seat=Sundance|Data2=1875|Data3=Parts of Laramie County and Albany County. |Data4=General [[George Crook]] <small>(1828–90)</small>, who served in the [[American Civil War]] and the [[Indian Wars]]. |Population= 7775 | Area= 2859 |Size=100px}}
{{Countyrow|N=56|Num=013|Name=Fremont|Seat=Lander|Data2=1884|Data3=Part of Sweetwater County. |Data4=[[John C. Frémont]] <small>(1813–90)</small>, explorer, [[United States Senate|U.S. Senator]] for [[California]], and the first presidential candidate of a major party to run on a platform in opposition to slavery |Population= 39721 | Area= 9183 |Size=100px}}
{{Countyrow|N=56|Num=015|Name=Goshen|Seat=Torrington|Data2=1911|Data3=Part of Laramie County. |Data4=The [[Land of Goshen]], a [[Biblical]] paradise. |Population= 12635 | Area= 2225 |Size=100px}}
{{Countyrow|N=56|Num=017|Name=Hot Springs|Seat=Thermopolis|Data2=1911|Data3=Parts of Fremont County, Big Horn County, and Park County. |Data4=The hot springs at [[Thermopolis, Wyoming|Thermopolis]] within the county borders.|Population= 4625 | Area= 2004 |Size=100px}}
{{Countyrow|N=56|Num=019|Name=Johnson|Seat=Buffalo|Data2=1875|Data3=Parts of Carbon County and Sweetwater County. |Data4=Edward P. Johnson <small>(1843–1879)</small>, a lawyer from [[Cheyenne, Wyoming|Cheyenne]], Wyoming. (Initial name, Pease County, named for E. L. Pease, President of the Territorial Legislative Council.)<ref>{{cite web |title=Pease County |url=http://pluto.wyo.gov/awweb/awarchive?item=11139550 |website=Wyoming Places |access-date=February 27, 2022}}</ref>|Population= 8803 | Area= 4166 |Size=100px}}
{{Countyrow|N=56|Num=021|Name=Laramie|Seat=Cheyenne|Data2=1867|Data3=One of the original five counties.|Data4=[[Jacques La Ramee]] <small>(1785?–1821)</small>, a [[French-Canadian]] [[fur trade|fur trapper]]. |Population= 101783 | Area= 2686 |Size=100px}}
{{Countyrow|N=56|Num=023|Name=Lincoln|Seat=Kemmerer|Data2=1911|Data3=Part of Uinta County. |Data4=[[Abraham Lincoln]] <small>(1809–65)</small>, U.S. President <small>(1861–65)</small>|Population= 21000 | Area= 4069 |Size=100px}}
{{Countyrow|N=56|Num=025|Name=Natrona|Seat=Casper|Data2=1888|Data3=Part of Carbon County. |Data4=The [[natron]], or soda deposits found within the county's borders. ''Natrona'' means ''natron'' in [[Spanish language|Spanish]]. |Population= 80410 | Area= 5340 |Size=100px}}
{{Countyrow|N=56|Num=027|Name=Niobrara|Seat=Lusk|Data2=1911|Data3=Part of Converse County. |Data4=The [[Niobrara River]], which flows through the state. ''Niobrara'' is [[Omaha (tribe)|Omaha]] for ''flat or broad river''. |Population= 2301 | Area= 2626 |Size=100px}}
{{Countyrow|N=56|Num=029|Name=Park|Seat=Cody|Data2=1909|Data3=Part of Big Horn County. |Data4=[[Yellowstone National Park]] |Population= 31082 | Area= 6943 |Size=100px}}
{{Countyrow|N=56|Num=031|Name=Platte|Seat=Wheatland|Data2=1911|Data3=Part of Laramie County. |Data4=[[North Platte River]]. ''Plate'' is [[French language|French]] for ''flat''. |Population= 8512 | Area= 2085 |Size=100px}}
{{Countyrow|N=56|Num=033|Name=Sheridan|Seat=Sheridan|Data2=1888|Data3=Part of Johnson County. |Data4=[[Philip Sheridan]] (1831–88), [[American Civil War]] general. |Population= 32978 | Area= 2523 |Size=100px}}
{{Countyrow|N=56|Num=035|Name=Sublette|Seat=Pinedale|Data2=1921|Data3=Parts of Fremont County and Lincoln County. |Data4=[[William Sublette]], pioneer and fur trapper. |Population= 8965 | Area= 4882 |Size=100px}}
{{Countyrow|N=56|Num=037|Name=Sweetwater|Seat=Green River|Data2=1867|Data3=One of the original five counties.|Data4=[[Sweetwater River (Wyoming)|Sweetwater River]] (a tributary of the [[North Platte River]]), which flows through the state. (Original name, Carter County, named for sutler William Alexander Carter.)<ref>{{cite web |last1=Gardner |first1=Dudley |title=Sweetwater County, Wyoming |url=https://www.wyohistory.org/encyclopedia/sweetwater-county-wyoming |website=WyoHistory |access-date=February 27, 2022}}</ref>|Population= 41273 | Area= 10426 |Size=100px}}
{{Countyrow|N=56|Num=039|Name=Teton|Seat=Jackson|Data2=1921|Data3=Part of Lincoln County. |Data4=[[Teton Range]], a small [[mountain range]] of the [[Rocky Mountains]] at the Wyoming–[[Idaho]] state line|Population= 23272 | Area= 4008 |Size=100px}}
{{Countyrow|N=56|Num=041|Name=Uinta|Seat=Evanston|Data2=1869|Data3=One of the original five counties.|Data4=The [[Uinta Mountains]], named in turn after the [[Uintah tribe|Uintah]] [[Native Americans in the United States|Native American]] people. |Population= 20621 | Area= 2082 |Size=100px}}
{{Countyrow|N=56|Num=043|Name=Washakie|Seat=Worland|Data2=1911|Data3=Part of Big Horn County. |Data4=[[Washakie]] <small>(1804–1900)</small>, a leader of [[Shoshone]] [[Native American (U.S.)|Native American]] tribe. |Population= 7662 | Area= 2240 |Size=100px}}
{{Countyrow|N=56|Num=045|Name=Weston|Seat=Newcastle|Data2=1890|Data3=Part of Crook County |Data4=John Weston (1831–95), who was responsible for bringing the first railroad to the area. |Population= 6866 | Area= 2398 |Size=100px}}
|}

== References ==
{{Reflist}}

== Further reading ==
* {{cite web |last1=writer |first1=Statf |author-link1= |collaboration= |df= |year=2022 |location= |title=WYOMING COUNTY GOVERNMENT OVERVIEW |url=https://ce.naco.org//app/profiles/CountyGov/CountyGov_56000.pdf |url-access= |format= |department= |website=ce.naco.org |type= |language= |edition= |agency=National Association of Counties (NACo) |arxiv= |asin= |asin-tld= |bibcode= |bibcode-access= |biorxiv= |citeseerx= |doi= |doi-access= |doi-broken-date= |eissn= |hdl= |hdl-access= |isbn= |ismn= |issn= |jfm= |jstor= |jstor-access= |lccn= |medrxiv= |mr= |oclc= |ol= |ol-access= |osti= |osti-access= |pmc= |pmc-embargo-date= |pmid= |rfc= |sbn= |ssrn= |s2cid= |s2cid-access= |zbl= |id= |url-status= |archive-url= |archive-format= |archive-date= |access-date=January 3, 2025 |quote-page= |quote-pages= |quote= |ref= }}

{{Wyoming}}
{{U.S. Counties}}
{{Authority control}}

[[Category:Lists of counties of the United States by state|Wyoming, counties in]]
[[Category:Wyoming counties|*List]]
[[Category:Wyoming geography-related lists|Counties]]