Timeline of Wyoming history

Main article:History of Wyoming

This timeline is achronology of significant events in the history of theU.S.State of Wyomingand the historical area now occupied by the state.

2000s1900s1800sStatehoodTerritory1700s1600s1500sBefore 1492

2020s

Year	Date	Event
2020	November 3	In the2020 General Election,Wyoming voters elect threeU.S. Presidential ElectorsforPresidentDonald Trump,electCynthia Lummisas newU.S. Senator,and re-electLiz CheneyasU.S. Representative.Republicansretain control of theWyoming Legislature.
	September 17	TheMullen Fireignites 7 miles (11 km) west ofCentennial.As many as 1,254 firefighters battle the wildfire as it spreads throughCarbon County,Albany County,andJackson County, Colorado,and consumes 176,878 acres (716 km2) of forest.
	April 1	The2020 United States Censusenumerates the population of the State of Wyoming, estimated to be about 580,000.

2010s

Year	Date	Event
2019	January 7	Mark Gordontakes office as the thirty-thirdGovernor of State of Wyoming.
	January 3	Liz Cheneytakes office as the WyomingU.S. Representative.
2017	August 21	Thesolar eclipse of August 21, 2017sweeps across Wyoming. Huge crowds gather inCasperandGlendoto witness thetotal solar eclipse.
2011	January 3	Matt Meadtakes office as the thirty-secondGovernor of State of Wyoming.
2010	April 1	The2010 United States Censusenumerates the population of the State of Wyoming, later determined to be 563,626, an increase of 14.1% since the2000 United States Census.Wyoming remains theleast populous of the 50 U.S. states.

2000s

Year	Date	Event
2007	January 3	John Barrassotakes office as the junior WyomingU.S. Senator.
2003	January 6	Dave Freudenthaltakes office as the thirty-firstGovernor of State of Wyoming.
2001	January 20	Dick Cheneytakes office as the forty-sixthVice President of the United States.
2000	April 1	The2000 United States Censusenumerates the population of the State of Wyoming, later determined to be 493,782, an increase of 8.9% since the1990 United States Census.Wyoming remains theleast populous of the 50 U.S. states.

1990s

Year	Date	Event
1997	January 3	Mike Enzitakes office as the junior WyomingU.S. Senator.
1995	January 2	Jim Geringertakes office as the thirtiethGovernor of State of Wyoming.
1992	August 3	U.S. PresidentGeorge H. W. Bushsigns into law an amendment to theNational Trails System Actto designate theCalifornia National Historic TrailandPony Express National Historic Trailas components of the National Trails System.
1990	April 1	The1990 United States Censusenumerates the population of the State of Wyoming, later determined to be 453,588, a decrease of -3.4% since the1980 United States Census.As its population decreases, Wyoming becomes theleast populous of the 50 U.S. states.

1980s

Year	Date	Event
1989	March 22	U.S. PresidentGeorge H. W. BushappointsDick Cheneythe seventeenthUnited States Secretary of Defense.
1988	November 8	TheTown of Alpineis incorporated.
	June 14	The first of over200 wildfiresbegin burning inYellowstone National Parkand adjacentnational forests.More than 9,000 firefighters battle the wildfires as they consume 793,880 acres (3,213 km2) of forest.
1987	January 5	Mike Sullivantakes office as the twenty-ninthGovernor of State of Wyoming.
1984	November 27	TheTown of Wrightis incorporated.
	March 8	TheTown of Rolling Hillsis incorporated.
1982	November 8	TheTown of Bar Nunnis incorporated.
1980	April 1	The1980 United States Censusenumerates the population of the State of Wyoming, later determined to be 469,557, an increase of 41.3% since the1970 United States Census.Wyoming remains the49th most populous of the 50 U.S. states.

1970s

Year	Date	Event
1979	December 18	TheTown of Hannaannexes the adjacentTown of Elmo.
	July 16	An F3 tornado makes landfall inCheyenne,killing 1 and injuring 40. It remains the most destructive tornado in the state's history.
1978	November 10	U.S. PresidentJimmy Cartersigns theNational Parks and Recreation Act of 1978authorizing theContinental Divide National Scenic Trail,theMormon Pioneer National Historic Trail,and theOregon National Historic Trail.
	October 9	TheUnited Nations Educational, Scientific and Cultural Organization (UNESCO)designatesYellowstone National Parkas one of the first 12World Heritage Sites.
1977	September	TheCity of CodytransfersShoshone Cavernto theBureau of Land Management.
1976	July 4	The State of Wyoming celebrates theBicentennial of the United States of America.
1975	January 6	Edgar J. Herschlertakes office as the twenty-eighthGovernor of State of Wyoming.
1973	April 26	TheTown of Midwestis incorporated.
	February 13	TheTown of La Bargeis incorporated.
1972	October 23	U.S. PresidentRichard Nixonissues a proclamation creatingFossil Butte National Monument.
1970	April 1	The1970 United States Censusenumerates the population of the State of Wyoming, later determined to be 332,416, an increase of 0.7% since the1960 United States Census.Wyoming becomes the49th most populous of the 50 U.S. states.

1960s

Year	Date	Event
1968	December 2	U.S. PresidentLyndon B. JohnsonsignsAn Act to establish a national trails system, and for other purposes,creating theNational Trails System.
1967	January 2	Stanley K. Hathawaytakes office as the twenty-seventhGovernor of State of Wyoming.
1966	October 15	U.S. PresidentLyndon B. JohnsonsignsAn Act to provide for the establishment of the Bighorn Canyon National Recreation Area, and for other purposes.
1963	January 7	Clifford P. Hansentakes office as the twenty-sixthGovernor of State of Wyoming.
1961	January 2	Jack R. Gagetakes office as the twenty-fifthGovernor of State of Wyoming.
1960	April 29	U.S. PresidentDwight D. EisenhowersignsAn Act to revise the boundaries and change the name of the Fort Laramie National Monument, Wyoming, and for other purposes,expandingFort Laramie National Monumentand changing the name toFort Laramie National Historic Site.
	April 1	The1960 United States Censusenumerates the population of the State of Wyoming, later determined to be 330,066, an increase of 13.6% since the1950 United States Census.Wyoming becomes the48th most populous of the 50 U.S. states.

1950s

Year	Date	Event
1959	January 3	John J. Hickeytakes office as the twenty-fourthGovernor of State of Wyoming.
1957	spring	Buffalo Bill State Park,Wyoming's first state park, opens.
1955	January 3	Milward Simpsontakes office as the twenty-thirdGovernor of State of Wyoming.
1954	June 29	TheTown of Frannieis incorporated.
	June 17	U.S. PresidentDwight D. EisenhowersignsAn Act to authorize the abolishment of the Shoshone Cavern National Monument and the transfer of the land therein to the city of Cody, Wyoming, for public recreational use, and for other purposes.
1953	January 3	Clifford J. Rogerstakes office as the twenty-secondGovernor of State of Wyoming.
1951	May 1	TheTown of Hulettis incorporated.
	January 1	Frank A. Barretttakes office as the twenty-firstGovernor of State of Wyoming.
1950	September 14	U.S. PresidentHarry TrumansignsAn Act to establish a new Grand Teton National Park in the State of Wyoming, and for other purposes,mergingJackson Hole National MonumentintoGrand Teton National Park.
	April 1	The1950 United States Censusenumerates the population of the State of Wyoming, later determined to be 290,529, an increase of 15.9% since the1940 United States Census.Wyoming remains the47th most populous of the 48 U.S. states.

1940s

Year	Date	Event
1949	January 3	Arthur G. Cranetakes office as the twentiethGovernor of State of Wyoming.
1945	September 2	World War IIends as theEmpire of Japanformally surrenders.
	May 8	Thewar in Europeends as theGreater German Empireformally surrenders.
1944	December 29	U.S. PresidentFranklin D. Rooseveltvetoes House Resolution 2241, "To abolish the Jackson Hole National Monument as created by Presidential Proclamation Numbered 2578, dated March 15, 1943."
1943	March 15	U.S. PresidentFranklin D. Rooseveltissues Executive Proclamation Number 2578, creatingJackson Hole National Monument.
	January 4	Lester C. Hunttakes office as the nineteenthGovernor of State of Wyoming.
1942	November 3	TheTown of Parcochanges its name to theTown of Sinclairat theGeneral Election of 1942.
1941	December 11	The United States declares war on theGerman Reichand theItalian Empire.
	December 8	The United States declares war on theEmpire of Japanand entersWorld War II.
	March 10	U.S. PresidentFranklin D. Rooseveltissues an executive order renamingWyoming National Forestas the re-establishedBridger National Forest.
1940	April 1	The1940 United States Censusenumerates the population of the State of Wyoming, later determined to be 250,742, an increase of 11.2% since the1930 United States Census.Wyoming remains the47th most populous of the 48 U.S. states.

1930s

Year	Date	Event
1939	January 2	Nels H. Smithtakes office as the eighteenthGovernor of State of Wyoming.
1938	July 16	U.S. PresidentFranklin D. Rooseveltissues a proclamation creatingFort Laramie National Monument.
	April 18	TheTown of La Grangeis incorporated.
1937	July 22	U.S. PresidentFranklin D. RooseveltsignsAn Act to create the Farmers' Home Corporation, to promote more secure occupancy of farms and farm homes, to correct the economic instability resulting from some present forms of farm tenancy, and for other purposes,also known as theBankhead-Jones Farm Tenant Act.
1935	August 6	TheTown of Hannais incorporated.
1933	May 3	U.S. PresidentFranklin D. RooseveltappointsNellie Tayloe Rossas the 28thDirector of the United States Mint,the first woman to hold the post. She will hold the office for twenty years.
	January 2	Leslie A. Millertakes office as the seventeenthGovernor of State of Wyoming.
1932	January 1	TheTown of Ten Sleepis incorporated.
1931	November 16	TheTown of Green Riverpasses theGreen River Ordinancethat prohibits door-to-door selling. Other towns across the country will adopt the ordinance.
	February 18	Alonzo M. Clarktakes office as the sixteenthGovernor of State of Wyoming.
1930	September 13	TheTown of Albinis incorporated.
	April 1	The1930 United States Censusenumerates the population of the State of Wyoming, later determined to be 225,565, an increase of 16.0% since the1920 United States Census.Wyoming remains the47th most populous of the 48 U.S. states.

1920s

Year	Date	Event
1929	July 10	U.S. PresidentCalvin CoolidgesignsAn Act to establish the Grand Teton National Park in the State of Wyoming, and for other purposes.
1927	January 3	Frank C. Emersontakes office as the fifteenthGovernor of State of Wyoming.
1925	November 3	TheTown of Edgertonis incorporated.
	April 1	TheTown of Parcois incorporated.(Changed name to theTown of Sinclairon November 3, 1942.)
	January 5	Nellie Tayloe Rosstakes office as the fourteenthGovernor of State of Wyoming.She becomes thefirst woman to be sworn in as governorof aU.S. state.
1924	October 2	Frank Lucastakes office as the thirteenthGovernor of State of Wyoming.
	June 2	U.S. PresidentCalvin CoolidgesignsAn Act To authorize the Secretary of the Interior to issue certificates of citizenship to Indians,also known as theIndian Citizenship Act of 1924,finally granting fullUnited States Citizenshipto allNative Americans born in the United States.
1923	May 14	U.S. PresidentWarren G. Hardingissues an executive order abolishingBridger National Forestand transferring its land toWyoming National Forest.(Wyoming National Forest will be renamed Bridger National Forest on March 10, 1941.)
	January 1	William B. Rosstakes office as the twelfthGovernor of State of Wyoming.
1922	May 1	TheTown of Glendois incorporated.
	April 15	WyomingU.S. SenatorJohn B. Kendrickintroduces a resolution calling for an investigation into theTeapot Dome scandal.
1921	February 15	The State of Wyoming creates two new counties: Sublette Countyfrom portions ofFremont CountyandLincoln County;and Teton Countyfrom a portion ofLincoln County.
1920	April 1	The1920 United States Censusenumerates the population of the State of Wyoming, later determined to be 194,402, an increase of 33.2% since the1910 United States Census.Wyoming becomes the47th most populous of the 48 U.S. states.

1910s

Year	Date	Event
1919	September 28	TheTown of Ranchesteris incorporated.
	January 6	Robert D. Careytakes office as the eleventhGovernor of State of Wyoming.
1918	November 11	Anarmisticehalts theGreat War.
1917	April 6	The United States declares war on theGerman Empireand enters theGreat War.
	February 26	Frank L. Houxtakes office as the tenthGovernor of State of Wyoming.
	January 29	TheTown of Elmois incorporated.(Annexed by the adjacentTown of Hannaon December 18, 1979.)
1916	August 25	U.S. PresidentWoodrow WilsonsignsAn Act To establish a National Park Service, and for other purposes.
	March 8	TheTown of Van Tassellis incorporated.
1915	January 4	John B. Kendricktakes office as the ninthGovernor of State of Wyoming.
1914	August 7	TheTown of Jacksonis incorporated.
	August 4	TheTown of Marbletonis incorporated.
	August 3	TheTown of Opalis incorporated.
	May 14	TheTown of Duboisis incorporated.
	April 21	TheTown of Wamsutteris incorporated.
1913	July 1	TheTown of Kayceeis incorporated.
	April 1	TheTown of Big Pineyis incorporated.
1912	February 12	TheTown of Pinedaleis incorporated.
1911	June 30	U.S. PresidentWilliam Howard Taftissues proclamations creatingWashakie National ForestandBridger National Forest.(Bridger National Forest will be abolished May 14, 1923, but re-established March 10, 1941.)
	February 21	The State of Wyoming creates seven new counties: Campbell Countyfrom portions ofCrook CountyandWeston County; Goshen Countyfrom a portion ofLaramie County; Hot Springs Countyfrom portions ofBig Horn County,Fremont County,andHot Springs County; Lincoln Countyfrom a portion ofUinta County; Niobrara Countyfrom a portion ofConverse County; Platte Countyfrom a portion ofLaramie County;and Washakie Countyfrom a portion ofBig Horn County.
	January 2	Joseph M. Careytakes office as the eighthGovernor of State of Wyoming.
1910	July 1	U.S. PresidentWilliam Howard Taftissues a proclamation re-establishingMedicine Bow National Forest.
	June 28	U.S. PresidentWilliam Howard Taftissues a proclamation creatingPalisade National Forest.
	May 31	TheTown of Cokevilleis incorporated.
	May 10	TheTown of Powellis incorporated.
	April 1	The1910 United States Censusenumerates the population of the State of Wyoming, later determined to be 145,965, an increase of 57.7% since the1900 United States Census.Wyoming becomes the45th most populous of the 46 U.S. states.

1900s

Year	Date	Event
1909	September 24	The State of Wyoming createsPark Countyfrom a portion ofBig Horn County.
	September 21	U.S. PresidentWilliam Howard Taftissues an executive order creatingShoshone Cavern National Monument.
	June 6	TheTown of Medicine Bowis incorporated.
	June 1	TheTown of Lost Cabinis incorporated.
	May 14	TheTown of Pine Bluffsis incorporated.
	May 12	TheTown of Rock Riveris incorporated.
	February 4	TheTown of Hudsonis incorporated.
1908	October 18	TheTown of Uptonis incorporated.
	July 2	U.S. PresidentTheodore Rooseveltissues an executive order creatingBighorn National Forest.
	July 1	U.S. PresidentTheodore Rooseveltissues executive orders creatingTarghee National Forest,Teton National Forest,Wyoming National Forest,Bonneville National Forest,Ashley National Forest,andShoshone National Forest.
	June 30	U.S. PresidentTheodore Rooseveltissues an executive order creatingCheyenne National Forest.
	June 26	U.S. PresidentTheodore Rooseveltissues an executive order creatingSundance National Forest.
	June 25	U.S. PresidentTheodore Rooseveltissues an executive order creatingHayden National Forest.
	May 11	U.S. PresidentTheodore Rooseveltissues an executive order creatingLewis and Clark Cavern National Monument.
	March 28	Two coal gas explosions in theUnion Pacific Coal Company'sHanna Mine No. 1kill 59 miners.
1907	July 8	TheTown of Sheridanis incorporated.
	March 1	U.S. PresidentTheodore Rooseveltissues a proclamation creating theBear Lodge Forest Reserve.
	January 15	U.S. PresidentTheodore Rooseveltissues a proclamation creating theCaribou Forest Reserve.
	January 4	TheTown of Torringtonis incorporated.
1906	November 5	U.S. PresidentTheodore Rooseveltissues a proclamation creating theSierra Madre Forest Reserve.
	October 2	TheTown of Moorcroftis incorporated.
		TheTown of Rivertonis incorporated.
	September 24	U.S. PresidentTheodore Rooseveltissues a proclamation creatingDevils Tower National Monument,the firstUnited States National Monumentcreated under theAntiquities Act.
	July 2	TheTown of Daytonis incorporated.
	June 8	U.S. PresidentTheodore RooseveltsignsAn Act For the preservation of American antiquities,also known as theAntiquities Act of 1906,giving the President of the United States the authority to createnational monumentsonfederal landsto protect significant natural, cultural, or scientific features.
	April 2	TheTown of Shoshoniis incorporated.
	March 30	TheTown of Worlandis incorporated.
	January 16	U.S. PresidentTheodore Rooseveltissues a proclamation creating theUinta Forest Reserve.
1905	November 18	TheTown of Wheatlandis incorporated.
	January 2	Bryant B. Brookstakes office as the seventhGovernor of State of Wyoming.
1903	June 30	A coal gas explosion in theUnion Pacific Coal Company'sHanna Mine No. 1kills 169 miners.
	April 28	Fenimore Chattertontakes office as the sixthGovernor of State of Wyoming.
1902	July 7	TheTown of Basinis incorporated.
	May 22	U.S. PresidentTheodore Rooseveltissues a proclamation creating theYellowstone Forest Reserveand theMedicine Bow Forest Reserve.
	April 24	TheTown of Aftonis incorporated.
	April 4	TheTown of Guernseyis incorporated.
1901	October 1	TheTown of Codyis incorporated.
	August 7	TheTown of Meeteetseis incorporated.
	April 2	TheTown of Encampmentis incorporated.
	March 2	TheTown of Diamondvilleis incorporated.
1900	October 10	U.S. PresidentWilliam McKinleyissues a proclamation creating theCrow Creek Forest Reserve.
	July 1	TheTown of Saratogais incorporated.
	April 28	A coal gas explosion in theUnion Pacific Coal Company'sHanna Mine No. 1kills miner Henry Ward.
	April 1	The1900 United States Censusenumerates the population of the State of Wyoming, later determined to be 92,531, an increase of 47.9% since the1890 United States Census.Wyoming becomes the44th most populous of the 45 U.S. states.
	February 17	TheTown of Hartvilleis incorporated.

1890s

Year	Date	Event
1899	January 23	TheTown of Kemmereris incorporated.
	January 21	TheTown of Thermopolisis incorporated.
	January 2	DeForest Richardstakes office as the fifthGovernor of State of Wyoming.
1898	December 10	TheUnited States of Americaand theKingdom of Spainsign theTreaty of Paris of 1898to end theSpanish–American War.
	September 19	U.S. PresidentWilliam McKinleyissues a proclamation creating theBlack Hills Forest Reserve.
	August 12	TheUnited States of Americaand theKingdom of Spainsign aProtocol of Peace.
	June 17	TheTown of Luskis incorporated.
	April 23	TheKingdom of Spaindeclareswaron theUnited States of America.The United States declares war on Spain two days later.
1897	September 23	Cheyennehosts the firstCheyenne Frontier Days.
	February 22	U.S. PresidentGrover Clevelandissues proclamations creating theTeton Forest Reserveand theBig Horn Forest Reserve.
1895	January 7	William A. Richardstakes office as the fourthGovernor of State of Wyoming.
1893	January 2	John E. Osbornetakes office as the thirdGovernor of State of Wyoming.
1892	January 7	TheTown of Gilletteis incorporated.
1891	November 24	Amos W. Barbertakes office as the secondGovernor of State of Wyoming.
	June 10	TheTown of Green Riveris re-incorporated under the laws of the State of Wyoming.
	March 30	U.S. PresidentBenjamin Harrisonissues a proclamation creating theYellowstone Park Timber Land Reserve,the firstUnited States National Forest.
	March 3	U.S. PresidentBenjamin HarrisonsignsAn act to repeal timber-culture laws, and for other purposes,also known as theForest Reserve Act of 1891,giving the President of the United States the authority to create protectednational forestsonfederal lands.
1890	October 11	Territorial GovernorFrancis E. Warrentakes office as the firstGovernor of State of Wyoming.
	July 17	TheTown of Landeris incorporated.
	July 10	U.S. PresidentBenjamin HarrisonsignsAn Act to provide for the admission of the State of Wyoming into the Union, and for other purposes.TheTerritory of Wyomingbecomes theState of Wyoming,the44th U.S. stateand the first U.S. state togrant women the right to vote.Wyoming later becomes known as theEquality State.
	April 1	The1890 United States Censusenumerates the population of the Territory of Wyoming, later determined to be 62,555, an increase of 200.9% since the1880 United States Census.Wyoming becomes thefifth most populous of the six U.S. territories.
	March 12	The Territory of Wyoming creates two new counties: Big Horn Countyfrom portions ofFremont County,Johnson County,andSheridan County;and Weston Countyfrom a portion ofCrook County.

1880s

Year	Date	Event
1889	October 25	TheTown of Newcastleis incorporated.
	July 8	TheTown of Casperis incorporated.
	April 9	U.S. PresidentBenjamin HarrisonappointsFrancis E. Warrenthe tenth (and last)Governor of Territory of Wyoming.
1888	June 1	TheTown of Evanstonis incorporated.
	March 9	The Territory of Wyoming creates three new counties: Converse Countyfrom portions ofAlbany CountyandLaramie County; Natrona Countyfrom a portion ofCarbon County;and Sheridan Countyfrom a portion ofJohnson County.
1887	October 5	TheTown of Sundanceis incorporated.
	June 8	TheTown of Douglasis incorporated.
	January 24	U.S. PresidentGrover ClevelandappointsThomas Moonlightthe ninthGovernor of Territory of Wyoming.
1886	December 20	U.S. PresidentGrover ClevelandappointsElliot S.N. Morganthe eighthGovernor of Territory of Wyoming.
	November 11	U.S. PresidentGrover ClevelandappointsGeorge W. Baxterthe seventhGovernor of Territory of Wyoming.
	March 12	TheTown of Rawlinsis incorporated.
	March 4	The Territory of Wyoming establishes theUniversity of Wyoming.
1885	September 2	White immigrantminersriot and kill 28Chinese immigrant minersand burn 78 homes in theRock Springs massacre.
	February 28	U.S. PresidentChester A. ArthurappointsFrancis E. Warrenthe sixthGovernor of Territory of Wyoming.
	January 13	U.S. PresidentChester A. ArthurappointsElliot S.N. Morganthe fifthGovernor of Territory of Wyoming.
1884	April 4	TheTown of Buffalois incorporated.
	April 1	The Territory of Wyoming createsFremont Countyfrom a portion ofSweetwater County.
1882	July 18	U.S. PresidentChester A. ArthurappointsWilliam Halethe fourthGovernor of Territory of Wyoming.
1880	April 1	The1880 United States Censusenumerates the population of the Territory of Wyoming, later determined to be 20,789, an increase of 128.0% since the1880 United States Census.Wyoming becomes theleast populous of the eight U.S. territories.

1870s

Year	Date	Event
1879	December 13	The Territory of Wyoming changes the name ofPease CountytoJohnson County.
1878	April 10	U.S. PresidentRutherford B. HayesappointsJohn Wesley Hoytthe thirdGovernor of Territory of Wyoming.
1876	July 4	The Territory of Wyoming celebrates theCentennialof theUnited States of Americawhile still reeling from the defeat ofLieutenant ColonelGeorge Armstrong Custerand the7th Cavalry Regimentat theBattle of the Little Bighornon June 26.
1875	December 8	The Territory of Wyoming creates two new counties: Crook Countyfrom portions ofAlbany CountyandLaramie County;and Pease Countyfrom portions ofAlbany County,Carbon CountyandSweetwater County.
	March 1	U.S. PresidentUlysses S. GrantappointsJohn Milton Thayerthe secondGovernor of Territory of Wyoming.
1874	January 13	TheTown of Laramieis incorporated.
1872	March 1	U.S. PresidentUlysses S. GrantsignsAn Act to set apart a certain tract of land lying near the headwaters of the Yellowstone River as a public park,creatingYellowstone National Park,the world's first national park.
1870	April 1	The1870 United States Censusenumerates the population of the Territory of Wyoming, later determined to be 9,118. Wyoming becomes theleast populous of the nine U.S. territories.

1860s

Year	Date	Event
1869	December 16	TheUnion Pacific Railroadarrives inEvanston.
	December 10	The first session of theWyoming Territorial Legislaturemeets inCheyenne.The legislature passes andTerritorial GovernorCampbellsigns an act to re-incorporate theTown of Cheyenne, Wyoming Territory,and an act grantingwhitewomen the right to vote,the firstU.S. stateorterritoryto grantsuffrageto women.
	December 1	Wyoming Territorial GovernorJohn Allen Campbellcreates a fifth original county:Uinta County.
	May 24	John Wesley Powelllaunches thePowell Geographic ExpeditionfromGreen River.
	April 5	U.S. PresidentUlysses S. GrantappointsJohn Allen Campbellthe firstGovernor of Territory of Wyoming.
1868	December 16	The provisional legislature of Wyoming creates four original counties: Albany County, Carbon County, Laramie County(previouslyLaramie County, Dakota Territory), and Sweetwater County(previouslyCarter County, Dakota Territory).
	October 1	TheUnion Pacific Railroadarrives inGreen River.
	August 21	TheTown of Green River, Wyoming Territoryis incorporated under the laws of the previousTerritory of Dakota.(Re-incorporated under the laws of theState of Wyomingon June 10, 1891.)
	August 8	TheUnion Pacific Railroadarrives inRawlins Springs.
	July 25	U.S. PresidentAndrew JohnsonsignsAn Act to provide a temporary Government for the Territory of Wyomingwhich creates theTerritory of Wyomingfrom the portion of theTerritory of Dakotawest of the27th meridian west from Washington,and the portions ofTerritory of Idahoand theTerritory of Utaheast of the34th meridian west from Washington.The boundaries of the Territory of Wyoming remain unchanged to the present-dayState of Wyoming.
	May 4	TheUnion Pacific Railroadarrives inLaramie.
1867	December 27	TheTerritory of DakotacreatesCarter County, Dakota Territoryfrom a portion ofLaramie County, Dakota Territory.
	November 13	TheUnion Pacific Railroadarrives inCheyenne.
	September 8	TheUnited States ArmyestablishesFort D.A. Russellthree miles (5 km) west ofCheyenneto protect the railroad.
	August 8	TheTown of Cheyenne, Dakota Territory(formerlyCrow Creek Crossing) is incorporated.(Re-incorporated under the laws of theTerritory of Wyomingon December 10, 1869.)
	July 5	TheUnion Pacific Railroadplats the townsite ofCrow Creek Crossing, Dakota Territory.
	January 9	TheTerritory of DakotacreatesLaramie County, Dakota Territory.
1865	May 9	U.S. PresidentAndrew Johnsonproclaims the end of theAmerican Civil War.
1864	summer	Civil engineerJames A. Evansof theUnion Pacific Railroadlocates apassin theBlack Hills(later theLaramie Mountains) of theTerritory of Dakotathrough which theTranscontinental Railroadcould pass.
	May 26	U.S. PresidentAbraham LincolnsignsAn Act to provide a temporary Government for the Territory of Montana.In addition to creating the freeTerritory of Montana,the act transfers the portion of theTerritory of Idaho"included within the following boundaries, to wit: commencing at a point formed by the intersection of thethirty-third degree of longitude west from Washingtonwith theforty-first degree of north latitude;thence along said thirty-third degree of longitude to thecrest of the Rocky Mountains;thence northward along the said crest of the Rocky Mountains to its intersection with theforty-fourth degree and thirty minutes of north latitude;thence eastward along said forty-fourth degree thirty minutes north latitude to thethirty-fourth degree of longitude west from Washington;thence northward along said thirty-fourth degree of longitude to its intersection with theforty-fifth degree north latitude;thence eastward along said forty-fifth degree of north latitude to its intersection with thetwenty-seventh degree of longitude west from Washington;thence south along said twenty-seventh degree of longitude west from Washington to the forty-first degree north latitude; thence west along said forty-first degree of latitude to the place of beginning, "back to theTerritory of Dakota.
1863	March 3	U.S. PresidentAbraham LincolnsignsAn Act to provide a Temporary Government for the Territory of Idaho.The freeTerritory of Idahoencompasses all of the future State of Wyoming except the southwest corner lying south of the43rd parallel northand west of the27th meridian west from Washingtonwhich remains in theTerritory of Utah.
1861	June 6	Jefferson Territorial GovernorRobert Williamson Steeleproclaims theTerritory of Jeffersonofficially disbanded.
	April 12	TheAmerican Civil Warbegins with theBattle of Fort Sumter.
	March 4	Abraham Lincolnassumes office as the 16thPresident of the United States.
	March 2	OutgoingU.S. PresidentJames BuchanansignsAn Act to provide a temporary government for the Territory of Dakota, and to create the office of surveyor general therein.The freeTerritory of Dakotaencompasses the northeast portion of the future State of Wyoming lying north of the43rd parallel northand east of theContinental Divide of the Americas.South of the43rd parallel north,theTerritory of Nebraskais extended westward from theContinental Divide of the Americasto the27th meridian west from Washington,annexing the eastern portions of theTerritory of Utahand theTerritory of Washington.
	February 8	The sevensecessionistslave statescreate theConfederate States of America.
1860	November 6	Abraham Lincolnis electedPresident of the United States.Sevenslave stateswillsecedefrom theUnited States of Americabefore February 8, 1861.

1850s

Year	Date	Event
1859	October 24	Voters of thePike's Peak goldfieldsapprove the establishment of theProvisional Government of the Territory of Jefferson.The proposed territory includes the portion of the futureState of Wyomingsouth of the43rd parallel northand east of the110th meridian west.
	February 14	U.S. PresidentJames BuchanansignsAn Act for the Admission of Oregon into the Union.TheTerritory of Washingtonnow includes the western portion of the future State of Wyoming lying north of the42nd parallel northand southwest of theContinental Divide of the Americas.
1854	May 30	U.S. PresidentFranklin PiercesignsAn Act to Organize the Territories of Nebraska and Kansas.TheTerritory of Nebraskaincludes all of the future State of Wyoming northeast of theContinental Divide of the Americas.
1853	March 2	U.S. PresidentMillard FillmoresignsAn Act to establish the Territorial Government of Washington.
1851	April 5	TheState of Deseretdissolves and yields to theTerritory of Utah.
1850	September 9	TheTerritory of New Mexicoand theTerritory of Utahare established as part of theCompromise of 1850.U.S. PresidentMillard FillmoresignsAn Act to establish a Territorial Government for Utah.The Territory of Utah includes the southwestern portion of the future State of Wyoming lying south of the42nd parallel northand west of theContinental Divide of the Americas.
	summer	Jim Bridgerleads theStansbury Expeditionacross amountain passon theContinental Divide of the Americasnear the southGreat Divide Basinbifurcation point, later known asBridger Pass.Bridger Pass will become the crossing point for theOverland Trailand thePony Express.

1840s

Year	Date	Event
1849	June 26	TheU.S. ArmypurchasesFort Johnfrom theAmerican Fur Companyfor $4,000 and renames itFort Laramie.The fort becomes the headquarters for the Regiment of Mounted Rifles. With Army protection, Fort Laramie becomes a major stop on theEmigrant Trail,theBozeman Trail,Pony Express route,theDeadwood and Cheyenne Stage route,and the route of thefirst transcontinental telegraph.
	March 12	TheMormon settlersof theGreat Salt Lake Valleycreate theProvisional Government of the State of Deseretand electBrigham Youngas the first (and only)Governor.The proposed state includes the entireGreat Basinand the entiredrainage basin of the Colorado Riverwithin the United States. Although the proposed State of Deseret includes the southwestern portion of the futureState of Wyoming,it has no actual presence in the region.
1848	August 14	U.S. PresidentJames K. PolksignsAn Act to Establish the Territorial Government of Oregon.TheTerritory of Oregonincludes the western portion of the future State of Wyoming lying north of the42nd parallel northand southwest of theContinental Divide of the Americas.The rest of the future state remainsunorganized United States territory.
	February 2	The United States andUnited Mexican Statessign theTreaty of Guadalupe Hidalgoto end theMexican–American War.Mexico relinquishes all of itsnorthern territories.All land in the future State of Wyoming becomesunorganized United States territory.
1846	May 13	The United States declares war on theMexican Republic.
	February 14	TheState of Texascedes the territorial claims of theRepublic of Texasto the United States. The boundaries of the State of Texas within those territorial claims remain undefined. The United States now claims theRio Grandeas its border withMexico.
1845	December 29	The United States admits theRepublic of Texasto theUnionas theslaveState of Texasbut declines to define its borders. TheMexican Republicmaintains that Texas is still its territory by theTreaty of Limitsof 1828 and states that it will fight to regain Texas.
1842	spring	Jim BridgerandLouis VasquezestablishFort BridgeralongBlacks Fork of the Green Riverin theMexican territoryofAlta California.Fort Bridger will become an important stop on theEmigrant Trail.
1841	autumn	TheAmerican Fur Companycompletes a $10,000 adobe replacement forFort Williamnow namedFort John.
1840	autumn	Lancaster LuptonestablishesFort Platte1 mile (1.6 km) north ofFort Williamat the confluence of theLaramie Riverand theNorth Platte River.

1830s

Year	Date	Event
1834	May 31	William SubletteandRobert CampbellestablishFort Williamat the confluence of theLaramie Riverand theNorth Platte River.Fort William is the first American settlement in the futureState of Wyomingand will become an important stop on theEmigrant Trail.

1820s

Year	Date	Event
1828	January 12	The United States and theUnited Mexican Statessign theTreaty of Limitsaffirming the boundaries set by theAdams–Onís Treatyof 1819.
1821	August 24	Ferdinand VII of Spainsigns theTreaty of Córdobarecognizing the independence of theMexican Empire.The southwestern portion of the future State of Wyoming lying south of the42nd parallel northand west of theContinental Divide of the Americasbecomes part of theMexican territoryofAlta California,although there is no Mexican presence in the region.
	August 10	TheState of Missouriis admitted to theUnion.The rest of theTerritory of Missouribecomesunorganized United States territory.
	March 2	U.S. PresidentJames MonroesignsAn Act to authorize the people of the Missouri territory to form a constitution and state government, and for the admission of such state into the Union on an equal footing with the original states, and to prohibit slavery in certain territories.
	February 22	TheAdams–Onís Treatyof 1819 takes effect. All land in the future State of Wyoming north of the42nd parallel northor east of themeridian 106°20'35 "westbecomes part of theTerritory of Missouri.

1810s

Year	Date	Event
1819	February 22	The United States and the restoredKingdom of Spainsign theAdams–Onís Treaty.The United States relinquinshes its claim to land west of the100th meridian west of Greenwichand southwest of theArkansas Riverand south of the42nd parallel north.Spain relinquishesFloridaand all claims to land north of the 42nd parallel in North America.
1814		William ClarkpublishesA Map of Lewis and Clark's Track Across the Western Portion of North America from the Mississippi to the Pacific Oceanwhich includes the route ofJohn Colter's explorations in 1807–1808.
1812	October 22	Robert Stuartand six companions from thePacific Fur CompanycrossSouth Pass,the lowest point on theContinental Divide of the Americasbetween theCentral Rocky Mountainsand theSouthern Rocky Mountains.South Pass will become the crossing point for theOregon Trail,theCalifornia Trail,and theMormon Trail.
	June 4	U.S. PresidentJames MadisonsignsAn Act providing for the government of the territory of Missouri.TheTerritory of Louisianais renamed theTerritory of Missouri.The Territory of Missouri includes all land in the future State of Wyoming northeast of theContinental Divide of the Americas.
1810	August 1	Mexican priestMiguel Gregorio Antonio Ignacio Hidalgo-Costilla y Gallaga Mandarte Villaseñor(Hidalgo)proclaims the independenceofMexicofrom theNapoleonic Kingdom of Spainin the village ofDolores.

1800s

Year	Date	Event
1807	autumn	Mountain manJohn Colterbecomes the first person from theUnited Statesto enter the futureState of Wyoming.Colter's description ofgeysers,fumaroles,andmudpotsalong theShoshone Riverled to the area being known asColter's Hell.
1805	March 3	U.S. PresidentThomas JeffersonsignsAn Act further providing for the government of the district of Louisiana.TheDistrict of Louisianais reorganized as the self-governingTerritory of Louisiana.The Territory of Louisiana includes all land in the future State of Wyoming northeast of theContinental Divide of the Americas.
1804	October 1	TheDistrict of Louisianais organized under the jurisdiction of theTerritory of Indiana.
	March 26	U.S. PresidentThomas JeffersonsignsAn Act erecting Louisiana into two territories, and providing for the temporary government thereof.The portion of theLouisiana Purchasenorth of the33rd parallel northis designated the militaryDistrict of Louisiana.
1803	December 20	TheFrench Republicturns its colony ofLa Louisianeover to the United States. All land in the future State of Wyoming northeast of theContinental Divide of the Americasbecomesunorganized United States territory.
	April 30	The United States and theFrench Republicsign theLouisiana Purchase Treaty.
1800	October 1	Under pressure fromNapoléon Bonaparte,theKingdom of Spaintransfers the colony ofla Luisianaback to theFrench Republicwith the secretThird Treaty of San Ildefonso.

1790s

Year	Date	Event

1780s

Year	Date	Event
1783	September 3	TheTreaty of Parisis signed inParisby representatives of KingGeorge IIIofGreat Britainand representatives of theUnited States of America.The treaty affirms the independence of the United States and sets theMississippi Riveras its western boundary.

1770s

Year	Date	Event
1776	July 4	Representatives of the thirteenUnited States of Americasign theDeclaration of Independencefrom theKingdom of Great Britain.

1760s

Year	Date	Event
1762	November 13	Fearing the loss of its American territories in theSeven Years' War,theKingdom of Francetransfers its colony ofLa Louisianeto theKingdom of Spainwith the secretTreaty of Fontainebleau.

1690s

Year	Date	Event

1680s

Year	Date	Event
1682	April 9	René-Robert Cavelier, Sieur de La Salle,claims theMississippi Riverand itswatershedfor theKingdom of Franceand names the regionLa Louisianein honor ofKing Louis XIV.The Mississippi Basin is later determined to be the fourth most extensive on Earth and includes lands inhabited by hundreds of thousands ofnative peoplesand lands previously claimed bySpain,France,andEngland.The Louisiane claim includes all land in the futureState of Wyomingnortheast of theContinental Divide of the Americas.This will set up a rivalry among native peoples, France, Spain, and eventually the United States in the area.

1590s

Year	Date	Event

1540s

Year	Date	Event
1541	June 28	ASpanishmilitary expedition led byHernando de Soto,Governor of Cuba,become the firstEuropeansto cross theMississippi River.

1510s

Year	Date	Event
1513	September 29	SpanishconquistadorVasco Núñez de Balboacrosses theIsthmus of Panamaand arrives on the shore of a sea that he namesMar del Sur(theSouth Sea,later named thePacific Ocean). He claims the sea and all adjacent lands for theQueen of Castile.This includes the portion of the future State of Wyoming southwest of theContinental Divide of the Americas.

1490s

Year	Date	Event
1493	May 5	Pope Alexander VI(bornRoderic de BorjainValencia) issues thepapal bullInter caeterawhich splits the non-Christian world into two halves. The eastern half goes to theKing of Portugalfor his exploration, conquest, conversion, and exploitation. The western half (including all ofNorth America) goes to theQueen of Castileand theKing of Aragonfor their exploration, conquest, conversion, and exploitation. Theindigenous peoples of the Americashave no idea that any of these people exist.
1492	October 12	GenoeseseamanCristòffa Cómbo(Christopher Columbus) leading an expedition forQueen Isabella I of Castilelands on theLucayan islandofGuanahanithat he renamesSan Salvador.This begins theSpanishconquest of theAmericas.

Before 1492

Era	Event
c. 12,000 BCE	During acenturies long period of warming,ice-agePaleoamericansfromBeringiabegin using the ice-free corridor east of theRocky Mountainstomigrate throughout the Americas.

2000s1900s1800sStatehoodTerritory1700s1600s1500sBefore 1492

See also

History of Wyoming

• Bibliography of Wyoming history
  • Bibliography of Yellowstone National Park
• Emigrant Trail in Wyoming
• List of counties in Wyoming
• List of ghost towns in Wyoming
• List of governors of Wyoming
• List of municipalities in Wyoming
• Outline of Wyoming
• Outline of Wyoming territorial evolution
  • Territory of Wyoming
  • State of Wyoming
• Timeline of Wyoming history
  • Timeline of Cheyenne, Wyoming

References

References are included in the linked articles.

External links

• State of Wyoming website
• Wyoming State Historical Society website