Wyoming

Köppen climate classification

On Interstate 80, leaving Utah

Autumn in the Bighorn Mountains

Wyoming's climate is generally semi-arid and continental (Köppen climate classification BSk), and is drier and windier in comparison to most of the United States with greater temperature extremes. Much of this is due to the topography of the state. Summers in Wyoming are warm with July high temperatures averaging between 85 and 95 °F (29 and 35 °C) in most of the state. With increasing elevation, however, this average drops rapidly with locations above 9,000 feet (2,700 m) averaging around 70 °F (21 °C). Summer nights throughout the state are characterized by a rapid cooldown with even the hottest locations averaging in the 50–60 °F (10–16 °C) range at night. In most of the state, most of the precipitation tends to fall in the late spring and early summer. Winters are cold, but are variable with periods of sometimes extreme cold interspersed between generally mild periods, with Chinook winds providing unusually warm temperatures in some locations.

Wyoming is a dry state with much of the land receiving less than 10 inches (250 mm) of rainfall per year. Precipitation depends on elevation with lower areas in the Big Horn Basin averaging 5–8 inches (130–200 mm), making the area nearly a true desert. The lower areas in the North and on the eastern plains typically average around 10–12 inches (250–300 mm), making the climate there semi-arid. Some mountain areas do receive a good amount of precipitation, 20 inches (510 mm) or more, much of it as snow, sometimes 200 inches (510 cm) or more annually. The state's highest recorded temperature is 114 °F (46 °C) at Basin on July 12, 1900 and the lowest recorded temperature is −66 °F (−54 °C) at Riverside on February 9, 1933.

The number of thunderstorm days vary across the state with the southeastern plains of the state having the most days of thunderstorm activity. Thunderstorm activity in the state is highest during the late spring and early summer. The southeastern corner of the state is the most vulnerable part of the state to tornado activity. Moving away from that point and westwards, the incidence of tornadoes drops dramatically with the west part of the state showing little vulnerability. Tornadoes, where they occur, tend to be small and brief, unlike some of those that occur farther east.

As specified in the designating legislation for the Territory of Wyoming, Wyoming's borders are lines of latitude 41°N and 45°N, and longitude 104°3'W and 111°3'W (27 and 34 west of the Washington Meridian)—a geodesic quadrangle.[15] Wyoming is one of only three states (the others being Colorado and Utah) to have borders defined by only "straight" lines. Due to surveying inaccuracies during the 19th century, Wyoming's legal border deviates from the true latitude and longitude lines by up to half of a mile (0.8 km) in some spots, especially in the mountainous region along the 45th parallel.[16] Wyoming is bordered on the north by Montana, on the east by South Dakota and Nebraska, on the south by Colorado, on the southwest by Utah, and on the west by Idaho. It is the tenth largest state in the United States in total area, containing 97,814 square miles (253,340 km²) and is made up of 23 counties. From the north border to the south border it is 276 miles (444 km);[17] and from the east to the west border is 365 miles (587 km) at its south end and 342 miles (550 km) at the north end.

Teton Range

Green River valley

The Great Plains meet the Rocky Mountains in Wyoming. The state is a great plateau broken by many mountain ranges. Surface elevations range from the summit of Gannett Peak in the Wind River Mountain Range, at 13,804 feet (4,207 m), to the Belle Fourche River valley in the state's northeast corner, at 3,125 feet (952 m). In the northwest are the Absaroka, Owl Creek, Gros Ventre, Wind River, and the Teton ranges. In the north central are the Big Horn Mountains; in the northeast, the Black Hills; and in the southern region the Laramie, Snowy, and Sierra Madre ranges.

The Snowy Range in the south central part of the state is an extension of the Colorado Rockies both in geology and in appearance. The Wind River Range in the west central part of the state is remote and includes more than 40 mountain peaks in excess of 13,000 ft (4,000 m) tall in addition to Gannett Peak, the highest peak in the state. The Big Horn Mountains in the north central portion are somewhat isolated from the bulk of the Rocky Mountains.

The Teton Range in the northwest extends for 50 miles (80 km), part of which is included in Grand Teton National Park. The park includes the Grand Teton, the second highest peak in the state.

The Continental Divide spans north–south across the central portion of the state. Rivers east of the divide drain into the Missouri River Basin and eventually the Gulf of Mexico. They are the North Platte, Wind, Big Horn and the Yellowstone rivers. The Snake River in northwest Wyoming eventually drains into the Columbia River and the Pacific Ocean, as does the Green River through the Colorado River Basin.

The Continental Divide forks in the south central part of the state in an area known as the Great Divide Basin where water that precipitates onto or flows into it cannot reach an ocean—it all sinks into the soil and eventually evaporates.

Several rivers begin in or flow through the state, including the Yellowstone River, Bighorn River, Green River, and the Snake River.

Wyoming has 32 named islands; the majority are in Jackson Lake and Yellowstone Lake, within Yellowstone National Park in the northwest portion of the state. The Green River in the southwest also contains a number of islands.

An enlargeable map of the 23 counties of Wyoming

The state of Wyoming has 23 counties.

Wyoming license plates have a number on the left that indicates the county where the vehicle is registered, ranked by an earlier census.[19] Specifically, the numbers are representative of the property values of the counties in 1930.[20] The county license plate numbers are:

Cheyenne, Wyoming

Casper, Wyoming

Evanston, Wyoming

Rawlins, Wyoming

The State of Wyoming has 99 incorporated municipalities.

In 2005, 50.6% of Wyomingites lived in one of the 13 most populous Wyoming municipalities.

The United States Census Bureau has defined two Metropolitan Statistical Areas (MSA) and seven Micropolitan Statistical Areas (MiSA) for the State of Wyoming. In 2008, 30.4% of Wyomingites lived in either of the Metropolitan Statistical Areas, and 73% lived in either a Metropolitan Statistical Area or a Micropolitan Statistical Area.

Wind River Canyon

The Wind River Indian Reservation is shared by the Eastern Shoshone and Northern Arapaho tribes of Native Americans in the central western portion of the state near Lander. The reservation is home to 2,500 Eastern Shoshone and 5,000 Northern Arapaho.[23]

Chief Washakie established the reservation in 1868[24] as the result of negotiations with the federal government in the Fort Bridger Treaty.[25] However, the Northern Arapaho were forced onto the Shoshone reservation in 1876 by the federal government after the government failed to provide a promised separate reservation.[25]

Today the Wind River Indian Reservation is jointly owned, with each tribe having a 50% interest in the land, water, and other natural resources.[26] The reservation is a sovereign, self-governed land with two independent governing bodies: the Eastern Shoshone Tribe and the Northern Arapaho Tribe. Until 2014, the Shoshone Business Council and Northern Arapaho Business Council met jointly as the Joint Business Council to decide matters that affect both tribes.[24] Six elected council members from each tribe served on the joint council.

Wyoming terrain map

Nearly half the land in Wyoming (about 30,099,430 acres (121,808.1 km²)) is owned by the federal government; the state owns another 3,864,800 acres (15,640 km²).[7] Most of it is administered by the Bureau of Land Management and U.S. Forest Service in numerous national forests and a national grassland, not to mention vast swaths of "public" land and an air force base near Cheyenne.

National Park Service sites map

There are also areas managed by the National Park Service and agencies such as the U.S. Fish and Wildlife Service.

National parks

• Grand Teton National Park
• Yellowstone National Park—first designated national park in the world[27]

Memorial parkway

• The John D. Rockefeller Jr. Memorial Parkway connects Yellowstone and Grand Teton.

National recreation areas

• Bighorn Canyon National Recreation Area
• Flaming Gorge National Recreation Area (managed by the Forest Service as part of Ashley National Forest)

National monuments

• Devils Tower National Monument—first national monument in the U.S.[27]
• Fossil Butte National Monument

National historic trails, landmarks and sites

• California National Historic Trail
• Fort Laramie National Historic Site
• Independence Rock National Historic Landmark
• Medicine Wheel/Medicine Mountain National Historic Landmark
• Mormon Pioneer National Historic Trail
• National Register of Historic Places listings in Wyoming
• Oregon National Historic Trail
• Pony Express National Historic Trail

National fish hatcheries

• Jackson National Fish Hatchery
• Saratoga National Fish Hatchery

National wildlife refuges

• National Elk Refuge
• Seedskadee National Wildlife Refuge

• 
  Yellowstone National Park
• 
  Devils Tower National Monument
• 
  Thunder Basin National Grassland
• 
  Seedskadee National Wildlife Refuge

Panoramic view of the Teton Range looking west from Jackson Hole, Grand Teton National Park

The largest population centers are Cheyenne (southeast) and Casper.

The United States Census Bureau estimates the population of Wyoming was 578,759 in 2019,[36] The center of population of Wyoming is in Natrona County.[37][38]

In 2014, the United States Census Bureau estimated the population's racial composition was 92.7% white (82.9% non-Hispanic white), 2.7% American Indian and Alaska Native, 1.6% Black or African American, 1.0% Asian American, and 0.1% Native Hawaiian or Pacific Islander.[39] As of 2011, 24.9% of Wyoming's population younger than age 1 were minorities.[40]

According to the 2010 census, the racial composition of the population was 90.7% white, 0.8% black or African American, 2.4% American Indian and Alaska Native, 0.8% Asian American, 0.1% Native Hawaiian and other Pacific Islander, 2.2% from two or more races, and 3.0% from some other race. Ethnically, 8.9% of the total population was of Hispanic or Latino origin (they may be of any race) and 91.1% Non-Hispanic, with non-Hispanic whites constituting the largest non-Hispanic group at 85.9%.[41]

As of 2015, Wyoming had an estimated population of 586,107, which was an increase of 1,954, or 0.29%, from the prior year and an increase of 22,481, or 3.99%, since the 2010 census. This includes a natural increase since the last census of 12,165 (33,704 births minus 21,539 deaths) and an increase from net migration of 4,035 into the state. Immigration resulted in a net increase of 2,264 and migration within the country produced a net increase of 1,771. In 2004, the foreign-born population was 11,000 (2.2%). In 2005, total births in Wyoming were 7,231 (birth rate of 14.04 per thousand).[42] Sparsely populated, Wyoming is the least populous state of the United States. Wyoming has the second-lowest population density in the country (behind Alaska) and is the sparsest-populated of the 48 contiguous states. It is one of only two states (Vermont) with a population smaller than that of the nation's capital.

According to the 2000 census, the largest ancestry groups in Wyoming are: German (26.0%), English (16.0%), Irish (13.3%), Norwegian (4.3%), and Swedish (3.5%).[43]

Note: Births in table don't add up, because Hispanics are counted both by their ethnicity and by their race, giving a higher overall number.

• Since 2016, data for births of White Hispanic origin are not collected, but included in one Hispanic group; persons of Hispanic origin may be of any race.

Wyoming's Constitution established three branches of government: the executive, legislative, and judicial branches. The state legislature comprises a House of Representatives with 60 members and a Senate with 30 members. The executive branch is headed by the governor and includes a secretary of state, auditor, treasurer and superintendent of public instruction. Wyoming does not have a lieutenant governor. The secretary of state is first in the line of succession.

Wyoming's sparse population warrants it only one at-large seat in the U.S. House of Representatives, and hence only three votes in the Electoral College.

The Wyoming State Liquor Association is the state's sole legal wholesale distributor of spirits, making it an alcoholic beverage control state. With the exception of wine, state law prohibits the purchase of alcoholic beverages for resale from any other source.[50]

Wyoming's highest court is the Supreme Court of Wyoming, with five justices presiding over appeals from the state's lower courts. Wyoming is unusual in that it does not have an intermediate appellate court, like most states. This is largely attributable to the state's population and correspondingly lower caseload. Appeals from the state district courts go directly to the Wyoming Supreme Court. Wyoming also has state circuit courts (formerly county courts), of limited jurisdiction, which handle certain types of cases, such as civil claims with lower dollar amounts, misdemeanor criminal offenses, and felony arraignments. Circuit court judges also commonly hear small claims cases as well.

Before 1972, Wyoming judges were selected by popular vote on a nonpartisan ballot. This earlier system was criticized by the state bar who called for the adoption of the Missouri Plan, a system designed to balance judiciary independence with judiciary accountability. In 1972, an amendment to Article 5 of the Wyoming Constitution, which incorporated a modified version of the plan, was adopted by the voters. Since the adoption of the amendment, all state court judges in Wyoming are nominated by the Judicial Nominating Commission and appointed by the Governor. They are then subject to a retention vote by the electorate one year after appointment.[51]

	Party	Registered Voters[52]	Percent	Party registration by county (December 2018):   Republican >= 40%   Republican >= 50%   Republican >= 60%   Republican >= 70%   Republican >= 80%
	Republican	176,355	67.18%
	Democratic	47,108	17.94%
	No party affiliation	35,745	13.62%
	Libertarian Party	2,386	0.91%
	Constitution Party	793	0.30%
	Other	137	0.05%
	Total Voters	262,524	100.00%

Wyoming's political history defies easy classification. The state was the first to grant women the right to vote and to elect a woman governor.[53] On December 10, 1869, John Allen Campbell, the first Governor of the Wyoming Territory, approved the first law in United States history explicitly granting women the right to vote. This day was later commemorated as Wyoming Day.[53] On November 5, 1889, voters approved the first constitution in the world granting full voting rights to women.[54]

While the state elected notable Democrats to federal office in the 1960s and 1970s, politics have become decidedly more conservative since the 1980s as the Republican Party came to dominate the state's congressional delegation. Today, Wyoming is represented in Washington by its two Senators, John Barrasso and Cynthia Lummis, and its one member of the House of Representatives, Congresswoman Liz Cheney. All three are Republicans; a Democrat has not represented Wyoming in the Senate since 1977 or in the House since 1978. The state has not voted for a Democrat for president since 1964, one of only eight times since statehood. At present, there is only one relatively reliably Democratic county, affluent Teton, and one swing county, college county Albany. In the 2004 presidential election, George W. Bush won his second-largest victory, with 69% of the vote. Former Vice President Dick Cheney is a Wyoming resident and represented the state in Congress from 1979 to 1989.

Republicans are no less dominant at the state level. They have held a majority in the state senate continuously since 1936 and in the state house since 1964. However, Democrats held the governorship for all but eight years between 1975 and 2011. Uniquely, Wyoming elected Democrat Nellie Tayloe Ross as the first woman in United States history to serve as state governor. She served from 1925 to 1927, winning a special election after her husband, William Bradford Ross, unexpectedly died a little more than a year into his term.[55]

Republicans have a majority of registered votes in all but two counties: Albany and Teton, where they have a plurality of registered voters.

In 2010, 93.39% (474,343) of Wyomingites over the age of 5 spoke English as their primary language. 4.47% (22,722) spoke Spanish, 0.35% (1,771) spoke German, and 0.28% (1,434) spoke French. Other common non-English languages included Algonquian (0.18%), Russian (0.10%), Tagalog, and Greek (both 0.09%).[56]

In 2007, the American Community Survey reported 6.2% (30,419) of Wyoming's population over five spoke a language other than English at home. Of those, 68.1% were able to speak English very well, 16.0% spoke English well, 10.9% did not speak English well, and 5.0% did not speak English at all.[57]

According to a 2013 Gallup Poll, the religious affiliations of the people of Wyoming were: 49% Protestants, 18% Catholics, 9% Latter-day Saints (Mormons) and less than 1% Jewish.[59]

A 2010 ARDA report recognized as the largest denominations in Wyoming the Church of Jesus Christ of Latter-day Saints (Mormons) with 62,804 (11%), the Catholic Church with 61,222 (10.8%) and the Southern Baptist Convention with 15,812 adherents (2.8%). The same report counted 59,247 Evangelical Protestants (10.5%), 36,539 Mainline Protestants (6.5%), 785 Eastern Orthodox Christians; 281 Black Protestants, as well as 65,000 adhering to other traditions and 340,552 not claiming any tradition.[60]

Due to its sparse population, Wyoming lacks any major professional sports teams. However, the Wyoming Cowboys and Cowgirls—particularly the football and basketball teams—are quite popular. Their stadiums in Laramie are about 7,200 feet (2,200 m) above sea level, the highest in NCAA Division I. The Wyoming High School Activities Association also sponsors twelve sports.

Casper has hosted the College National Finals Rodeo since 2001.

State flower of Wyoming: Indian paintbrush

List of all Wyoming state symbols:[1]

• State bird: western meadowlark (Sturnella neglecta)
• State coin: Sacagawea dollar
• State dinosaur: Triceratops
• State emblem: Bucking Horse and Rider
• State fish: cutthroat trout (Oncorhynchus clarki)
• State flag: Flag of the State of Wyoming
• State flower: Wyoming Indian paintbrush (Castilleja linariifolia)
• State fossil: Knightia
• State gemstone: Wyoming nephrite jade
• State grass: western wheatgrass (Pascopyrum smithii)
• State insect: Sheridan's green hairstreak butterfly (Callophrys sheridanii)
• State mammal: American bison (Bison bison)
• State motto: Equal Rights
• State nicknames: Equality State; Cowboy State; Big Wyoming
• State reptile: horned lizard (Phrynosoma douglassi brevirostre)
• State seal: Great Seal of the State of Wyoming
• State song: "Wyoming" by Charles E. Winter & George E. Knapp
• State sport: rodeo
• State tree: plains cottonwood (Populus sargentii)

North Antelope Rochelle Mine, the largest estimated coal mine reserve in the world, as of 2013[64]

A natural gas rig west of the Wind River Range

Wyoming's mineral commodities include coal, natural gas, coalbed methane, crude oil, uranium, and trona.

• Coal: Wyoming produced 395.5 million short tons (358.8 million metric tons) of coal in 2004, greater than any other state.[65] Wyoming possesses a reserve of 68.7 billion tons (62.3 billion metric tons) of coal. Major coal areas include the Powder River Basin and the Green River Basin
• Coalbed methane (CBM): The boom for CBM began in the mid-1990s. CBM is characterized as methane gas that is extracted from Wyoming's coal bed seams. It is another means of natural gas production. There has been substantial CBM production in the Powder River Basin. In 2002, the CBM production yield was 327.5 billion cubic feet (9.3 km³).
• Crude oil: Wyoming produced 53.4 million barrels (8.49×10^⁶ m³) of crude oil in 2007. The state ranked fifth nationwide in oil production in 2007.[66] Petroleum is most often used as a motor fuel, but it is also utilized in the manufacture of plastics, paints, and synthetic rubber.
• Diamonds: The Kelsey Lake Diamond Mine, located in Colorado less than 1,000 feet (300 m) from the Wyoming border, produced gem quality diamonds for several years. The Wyoming craton, which hosts the kimberlite volcanic pipes that were mined, underlies most of Wyoming.
• Natural gas: Wyoming produced 1.77 trillion cubic feet (50.0 billion m³) of natural gas in 2016. The state ranked 6th nationwide for natural gas production in 2016.[67] The major markets for natural gas include industrial, commercial, and domestic heating.
• Trona: Wyoming possesses the world's largest known reserve of trona,[68] a mineral used for manufacturing glass, paper, soaps, baking soda, water softeners, and pharmaceuticals. In 2008, Wyoming produced 46 million short tons (41.7 million metric tons) of trona, 25% of the world's production.[68]
• Wind power: Because of Wyoming's geography and high-altitude, the potential for wind power in Wyoming is one of the highest of any state in the US. The Chokecherry and Sierra Madre Wind Energy Project is the largest commercial wind generation facility under development in North America.[69] Carbon County is home to the largest proposed wind farm in the US. However, construction plans have been halted because of proposed new taxes on wind power energy production.[70]
• Uranium: Although uranium mining in Wyoming is much less active than it was in previous decades, recent increases in the price of uranium have generated new interest in uranium prospecting and mining.

Unlike most other states, Wyoming does not levy an individual or corporate income tax. In addition, Wyoming does not assess any tax on retirement income earned and received from another state. Wyoming has a state sales tax of 4%. Counties have the option of collecting an additional 1% tax for general revenue and a 1% tax for specific purposes, if approved by voters. Food for human consumption is not subject to sales tax.[71] There also is a county lodging tax that varies from 2% to 5%. The state collects a use tax of 5% on items purchased elsewhere and brought into Wyoming. All property tax is based on the assessed value of the property and Wyoming's Department of Revenue's Ad Valorem Tax Division supports, trains, and guides local government agencies in the uniform assessment, valuation and taxation of locally assessed property. "Assessed value" means taxable value; "taxable value" means a percent of the fair market value of property in a particular class. Statutes limit property tax increases. For county revenue, the property tax rate cannot exceed 12 mills (or 1.2%) of assessed value. For cities and towns, the rate is limited to eight mills (0.8%). With very few exceptions, state law limits the property tax rate for all governmental purposes.

Personal property held for personal use is tax-exempt. Inventory if held for resale, pollution control equipment, cash, accounts receivable, stocks and bonds are also exempt. Other exemptions include property used for religious, educational, charitable, fraternal, benevolent and government purposes and improvements for handicapped access. Mine lands, underground mining equipment, and oil and gas extraction equipment are exempt from property tax but companies must pay a gross products tax on minerals and a severance tax on mineral production.[72][73]

Wyoming does not collect inheritance taxes. There is limited estate tax related to federal estate tax collection.

In 2008, the Tax Foundation ranked Wyoming as having the single most "business friendly" tax climate of all 50 states.[74] Wyoming state and local governments in fiscal year 2007 collected $2.242 billion in taxes, levies, and royalties from the oil and gas industry. The state's mineral industry, including oil, gas, trona, and coal provided $1.3 billion in property taxes from 2006 mineral production.[66] Wyoming receives more federal tax dollars per capita in aid than any other state except Alaska. The federal aid per capita in Wyoming is more than double the United States average.[75]

As of 2016, Wyoming does not require the beneficial owners of LLCs to be disclosed in the filing, which creates an opportunity for a tax haven, according to Clark Stith of Clark Stith & Associates in Rock Springs, Wyoming, a former Republican candidate for Wyoming secretary of state.[76]

Major highways of Wyoming

The largest airport in Wyoming is Jackson Hole Airport, with more than 500 employees.[77] Three interstate highways and thirteen United States highways pass through Wyoming. In addition, the state is served by the Wyoming state highway system.

Interstate 25 enters the state south of Cheyenne and runs north, intersecting Interstate 80 immediately west of Cheyenne. It passes through Casper and ends at Interstate 90 near Buffalo. Interstate 80 crosses the Utah border west of Evanston and runs east through the southern third of the state, passing through Cheyenne before entering Nebraska near Pine Bluffs. Interstate 90 comes into Wyoming near Parkman and cuts through the northeastern part of the state. It serves Gillette and enters South Dakota east of Sundance.

U.S. Routes 14, 16, and the eastern section of U.S. 20 all have their western terminus at the eastern entrance to Yellowstone National Park and pass through Cody. U.S. 14 travels eastward before joining I-90 at Gillette. U.S. 14 then follows I-90 to the South Dakota border. U.S. 16 and 20 split off of U.S. 14 at Greybull and U.S. 16 turns east at Worland while U.S. 20 continues south Shoshoni. U.S. Route 287 carries traffic from Fort Collins, Colorado into Laramie, Wyoming through a pass between the Laramie Mountains and the Medicine Bow Mountains, merges with US 30 and I-80 until it reaches Rawlins, where it continues north, passing Lander. Outside of Moran, U.S. 287 is part of a large interchange with U.S. Highways 26, 191, and 89, before continuing north to the southern entrance of Yellowstone. U.S. 287 continues north of Yellowstone, but the two sections are separated by the national park.

Other U.S. highways that pass through the state are 18, 26, 30, 85, 87, 89, 189, 191, 212, and 287.

Wyoming is one of only two states (South Dakota) in the 48 contiguous states not served by Amtrak.[78] It was once served by Amtrak's San Francisco Zephyr and Pioneer lines.

Wyoming has one public four-year institution, the University of Wyoming in Laramie and one private four-year college, Wyoming Catholic College, in Lander, Wyoming. In addition, there are seven two-year community colleges spread throughout the state.

Before the passing of a new law in 2006, Wyoming had hosted unaccredited institutions, many of them suspected diploma mills.[80] The 2006 law is forcing unaccredited institutions to make one of three choices: move out of Wyoming, close down, or apply for accreditation. The Oregon State Office of Degree Authorization predicted in 2007 that in a few years the problem of diploma mills in Wyoming might be resolved.[81]