Description: Detailed large map of Wyoming State, USA showing cities, towns, county formations, roads highway, US highways and State routes.
Look at the map as a whole and Wyoming reads almost like a clean rectangle, with all 23 counties laid out edge to edge. The North Platte, Green, and Snake rivers act as the main orientation lines running through the interior, and Yellowstone National Park anchors the whole northwest corner.
Borders and waters at a glance: Wyoming's northern edge meets Montana across Park, Big Horn, Sheridan, Campbell, and Crook counties. The northeast corner also brushes South Dakota through Crook, Weston, and Niobrara, and the east side meets Nebraska through Niobrara, Goshen, and Laramie County. Down south, Colorado borders Laramie County, Albany, Carbon, and Sweetwater, while the southwest corner touches Utah through Sweetwater and Uinta. On the west side, Idaho runs the whole length past Teton and Lincoln counties.
Road-light orientation: Light corridor cues for I-25, I-80, and I-90 are enough to place the state's biggest anchors without cluttering the county lines: Cheyenne in Laramie County, Casper in Natrona County, Gillette in Campbell County, and Sheridan in Sheridan County.
Laramie County, which has Cheyenne as its seat, occupies the southeastern corner of the state where I-25 meets I-80. Cheyenne's proximity to both state lines, due to the counties' unique shapes, also allows for distinctive lines that are easy to spot and offers great accessibility. Albany County, which has Laramie as its seat and lies just west of I-80 in the Laramie Valley, has the Snowy Range rising just west of town and the granite outcrops of Vedauwoo just east of town.
Platte County's seat, Wheatland, forms a neat rectangle along the North Platte River. Guernsey and its reservoir are a familiar stop between Wheatland and the Nebraska line. The county seat of Goshen County is Torrington, and it lies along Nebraska's border in the eastern part of the state. Further, irrigated bottomland of the North Platte has helped develop Fort Laramie and Lingle. Farming centers around these places. The least populous county in Wyoming is Niobrara County, seat Lusk, a tall block of open High Plains that reaches for the South Dakota corner.
The largest county in Wyoming by area is Sweetwater County, seat Green River, which is mainly a light tan area (the color of the soil) called the Red Desert and the Great Divide Basin, which is all a very pale area (grey-hued) where the Continental Divide splits off for a brief distance and then rejoins. Located along I-80, Rock Springs is a couple of miles east of the seat, and Flaming Gorge Reservoir anchors the southwest corner of the county. The county of Carbon, with the seat of Rawlins, extends to the east by I-80 through the finished Medicine Bow uplift, and Saratoga and the Encampment River valley are situated to the south by the interstate.
The seat of Lincoln County is Kemmerer, which lies at the confluence of the Bear River and Star Valley. Afton, near the Idaho line, occupies the county's north end. Uinta County comprises the seat of Evanston and occupies the far southwest corner on I-80 right at the Utah state line. Mountain View is also in the vicinity, as well as Bear River State Park.
Natrona County is at the center of the state, with Casper built along the North Platte River below Casper Mountain. Both I-25 and US-20/26 go through the metro area of Mills and Evansville. East lies Converse County, seat Douglas - Glenrock is between the two seats, and coal-bed methane country stretches north toward Campbell County above 381.
Lander, seat of Fremont County, one of Wyoming's largest counties, takes in the Wind River Indian Reservation, and the high peaks of the Wind River Range toward South Pass. As the Wind River leaves the reservation, it starts calling itself the Bighorn River, which is a convenient feature to track the map north. Situated just west of the county of Sublette, with its seat at Pinedale, you'll find the headwaters lakes of the Green River with the Wyoming Range curving along the western edge.
Nestled around hot spring terraces at the mouth of the Wind River Canyon, Hot Springs County is Wyoming's smallest county by area. Thermopolis is the seat. Worland, the seat of Washakie County, is located just north on the Bighorn River, with Ten Sleep and the western face of the Bighorn Mountains located in the near distance. Big Horn County, which has its seat in Basin, extends to the Montana line, stringing together Greybull and Lovell at the river's bends.
Sheridan County, with its seat at Sheridan, lies on the Montana border at the pleasing foot of the Bighorn foothills. Ranchester and Dayton are nestled in the foothills, and I-90 gracefully enters from the north. Situated just south of the aforementioned geographic features is the county seat of Buffalo, or Johnson County, where Clear Creek and the forks of the Powder River are threaded through Buffalo.
Campbell County, the county seat of Gillette, is located in the center of the nation's most important coal-producing region, where I-90 and US-14/16 meet. The township of Wright supports the mining area to the south.
In the far northeast corner, Crook County, seat Sundance, hugs the Black Hills as they edge in from South Dakota and Devils Tower ascends over the Belle Fourche River valley. The county seat of Weston County, Newcastle, lies due south, with US-16 going through Upton to the Black Hills.
To the east of Yellowstone Park and to the north of Shoshone National Forest lies the mostly flat area of Park County (Cody). The Shoshone River runs through the area, with Cody and Powell largely situated along it.
You reach the park's east entrance by driving east on US-14/16/20. Teton County, in which Jackson, the seat, is located, contains Jackson Hole and almost all of Grand Teton National Park, with the Snake River and Jackson Lake providing clear orientation lines and US-89/191/26 threading the valley floor.
Since the color of each county block is different, and every seat is printed in the same manner, the daily questioning gets resolved quickly. Casper is in which county? Natrona. Where is Gillette found? Campbell County of the Powder River Basin. What seat is for Yellowstone's east entrance? Cody is situated in Park County.
What is the seat located in the southeast corner? Cheyenne, located in Laramie County. Which way is Jackson from Cody? In the southwestern side, Fremont and Park counties sit. The map is valuable to the local and the visitor alike: counties paramount, with just the right amount of network to orient direction.
The five rivers primarily responsible for the map are. Rivers run through Saratoga, Casper, Douglas, Guernsey, and Torrington. Green River flows south from Sublette through Sweetwater and to Flaming Gorge. The Snake River flows through Teton County into Idaho through Jackson Hole.
It is noted that the Wind River leaves its canyon near Thermopolis. At this point, it takes on the name of the Bighorn River. This river continues north, through the Bighorn Basin. In northeastern Wyoming, the Powder River flows eastward. This river is a right tributary in the Yellowstone River basin. In addition, the Powder River drains the Johnson's basin. Do not forget those five, plus the county, on the map.
The creation of this road layer is simplified. The towns that I-80 goes through are Evanston, Rock Springs, and Cheyenne. I-25 Corridor Services Cheyenne, Douglas, Casper, and Buffalo. I-90 traverses through Sheridan, Gillette, and Sundance in the north. The western valleys through Jackson Hole and the Green River country lead to US-191, US-189, US-89, US-14, US-16, US-20, US-26, and on to Yellowstone, WY, and the Bighorn basins. None of these applications will give turn-by-turn messages; they are only for placement in the county.
Every one of Wyoming's 23 counties and its seat, in alphabetical order: Albany County (Laramie), Big Horn County (Basin), Campbell County (Gillette), Carbon County (Rawlins), Converse County (Douglas), Crook County (Sundance), Fremont County (Lander), Goshen County (Torrington), Hot Springs County (Thermopolis), Johnson County (Buffalo), Laramie County (Cheyenne), Lincoln County (Kemmerer), Natrona County (Casper), Niobrara County (Lusk), Park County (Cody), Platte County (Wheatland), Sheridan County (Sheridan), Sublette County (Pinedale), Sweetwater County (Green River), Teton County (Jackson), Uinta County (Evanston), Washakie County (Worland), and Weston County (Newcastle).
The state that borders Montana to the north is Wyoming. South Dakota and Nebraska border the state to the east. Colorado borders it to the south. Wyoming's southwestern part contains Utah. The western state is Idaho. Wyoming is home to six neighbors, fewer than any other state. There are 23 counties in the state.
Sweetwater is the largest county in Wyoming, and Hot Springs County is the state's smallest county in Wyoming. Sweetwater County has an area of 10,426 sq mi, while Hot Springs County has an area of 2,004 sq mi.
As of 2021, it is estimated that Laramie County will have the largest population, at 102,938. In conclusion, Niobrara County has the least, at about 2,341. In 1867, both counties were established in the Dakota Territory.
Additionally, Laramie and Sweetwater counties may consider themselves to be the oldest. Two years before 1869, Wyoming became a territory. The region covers about 97,813 square miles. The area of land is around 97,093 square miles. The U.S. states are on the same landmass. Nonetheless, the region has the smallest population.
Cheyenne is situated in the southeast corner of Wyoming, in Laramie County, the state capital. Casper in the center, Gillette and Sheridan in the north, and Jackson in the far northwest are significant anchors. The eastern region is characterized by elevated plains, while the northern part encompasses the Powder River and Bighorn basins, as well as additional basins farther west. The Wind River Range is located in the middle of the state, while the Absaroka is found in the northwestern end.
The ten largest cities in Wyoming by current population are Cheyenne (approximately 65,168, Laramie County), Casper (approximately 58,720, Natrona County), Gillette (approximately 33,496, Campbell County), Laramie (approximately 32,152, Albany County), Rock Springs (approximately 22,954, Sweetwater County), Sheridan (approximately 19,543, Sheridan County), Evanston (approximately 11,807, Uinta County), Green River (approximately 11,496, Sweetwater County), Riverton (approximately 10,923, Fremont County) and Jackson (approximately 10,639, Teton County).
Situated at the junction of I-25 and I-80 is Cheyenne; the state seat of government and a burgeoning logistics and data-center corridor. Casper, the commercial center of the surrounding oil and gas fields, is located to its northeast. Gillette, located in Campbell County, is situated in the Powder River Basin, a region that currently produces a large share of the nation's coal, and is developing wind and natural gas resources.
Trona mining, a material utilized to create soda ash, adds to the energy mix in Sweetwater County's Rock Springs and Green River. Cattle, hay, sugar beets, and wool lead production, but ranching and agriculture remain a backbone of the economy across the eastern plains as well as the irrigated valleys of Goshen and Platte counties.
The concentration of tourists is in the northwest part of the state, where Teton County's Jackson Hole and Park County's gateway to Yellowstone and Grand Teton National Parks attract visitors year-round. These visitors come for skiing, hiking, wildlife viewing, and more. Wyoming's lack of coastline limits water trade activities to recreation, not shipping.
Wyoming granted women their right to vote in 1869 while it was still a territory. It was the first state to give women any voting rights. The origin of its name, the Equality State, celebrates this distinction. Each summer, held in Laramie County, Cheyenne's Frontier Days bills itself as the world's largest outdoor rodeo.
Frontier Days draws rodeo, ranching, and Western heritage fans from all over the country. Cody is the seat of Park County and continues to display a western spirit through the Buffalo Bill Center of the West, as well as summer rodeos that occur nightly.
Sheridan County's ranch culture ranges from historic dude ranches to Native American history associated with the Bighorn Mountains, and Fremont County houses Wind River Indian Reservation of the Eastern Shoshone + Northern Arapaho.
The only four-year public college in Wyoming is the University of Wyoming in Laramie, Albany County. Jackson in Teton County has become a cultural magnet of its own with its galleries and a notable wildlife art museum. It has a downtown built around the Town Square with its antler arches.
This map uses Yellowstone National Park at the (northwest corner) and North Platte, Green, and Snake rivers to find counties quickly. For locating counties and looking for details about elevation, terrain, watersheds, and land-cover, see our Physical Map of Wyoming.
Wyoming has a semi-arid to arid continental climate, with cold, often windy winters and mild, dry summers that turn cooler at higher elevations in the mountain counties. For a full seasonal and biome breakdown, see our Physical Map of Wyoming.
Using I-25, located more to the east of the state, north, and south movement is possible on the major highway system in Wyoming. The route passes through Cheyenne, Douglas, Casper, and Buffalo. There are two freeways for east-west travel in Wyoming. The I-80 travels through the south from Utah's border through Evanston, Rock Springs, Rawlins, and Laramie to Cheyenne.
The I-90 runs through southeastern Montana, entering from the Montana border through Sheridan and Gillette, and exiting at the South Dakota border near Sundance. Due to the lack of any interstate going into the far northwest, US routes such as US-89, US-191, and US-26 carry traffic bound for Jackson and Yellowstone instead. Note that Wyoming ZIP code does not follow county lines.
A ZIP code can therefore belong to two counties. Check the county name on the map or in the index rather than assuming it based on the ZIP prefix. Be sure to plan your fuel and rest stops based on the distances between towns, which are quite large. The drive from Cheyenne to Casper is around 175 miles. The drive from Cheyenne to Jackson is well over 300 miles.
Refer to this map for quick reference. Each line names the county and its county seat (and a well-known city if the map shows one). It does not mention the river, border, and gentle corridor context only.
Laramie – Cheyenne; state capital, I-25 meets I-80.
Albany – Laramie; Laramie Valley, Snowy Range to the west.
Platte – Wheatland; North Platte River corridor.
Goshen – Torrington; irrigated bottomland on the Nebraska line.
Niobrara – Lusk; High Plains, Wyoming's least populous county.
Sweetwater – Green River; Red Desert, Wyoming's largest county by area.
Carbon – Rawlins; Medicine Bow uplift along I-80.
Lincoln – Kemmerer; Bear River and Star Valley.
Uinta – Evanston; southwest corner on the Utah line.
Natrona – Casper; North Platte River, state's geographic middle.
Converse – Douglas; North Platte River, east of Casper.
Fremont – Lander; Wind River Indian Reservation, Wind River Range.
Sublette – Pinedale; Green River headwaters.
Hot Springs – Thermopolis; Wind River Canyon, smallest county by area.
Washakie – Worland; Bighorn River.
Big Horn – Basin; Montana line, Bighorn River bends.
Sheridan – Sheridan; Bighorn Mountains, Montana line.
Johnson – Buffalo; Bighorn Mountain front.
Campbell – Gillette; Powder River Basin coal country.
Crook – Sundance; Black Hills, Devils Tower.
Weston – Newcastle; south of Crook on US-16.
Park – Cody; Yellowstone's east entrance.
Teton – Jackson; Jackson Hole, Grand Teton National Park.
This map directory is attuned to what you see on the page: every county, its seat, and a one-line locator to keep you focused on counties, not the driving steps.
Wyoming has 23 counties and the map shows every one with a colored block and county seat.
Cheyenne, in Laramie County, at the southeast corner along I-25 and I-80.
Natrona County, on the North Platte River.
Campbell County, center of the Powder River Basin.
Albany County.
Both are in Sweetwater County along I-80.
Sheridan County, at the foot of the Bighorn Mountains.
Uinta County, on the Utah line.
Fremont County, on the Wind River.
Teton County, in Jackson Hole.
Park, Big Horn, Sheridan, Campbell and Crook.
Crook, Weston and Niobrara.
Niobrara, Goshen and Laramie County.
Sweetwater, Carbon, Albany and Laramie County.
Sweetwater and Uinta.
Teton and Lincoln.
I-25, I-80, I-90, plus US-14, US-16, US-20, US-26, US-89, US-191 and US-287.
Mostly in Park and Teton counties in the northwest, reached from Cody or Jackson.
Cody is the seat of Park County.
In Hot Springs County, at the mouth of Wind River Canyon.
Johnson County, below the Bighorn Mountains.
Crook County.
In Sublette County, near Fremont Lake.
Lusk is the seat of Niobrara County.
Wheatland is the seat of Platte County.
Torrington is the seat of Goshen County, on the Nebraska line.
Kemmerer is the seat of Lincoln County.
Rawlins is the seat of Carbon County.
Douglas is the seat of Converse County.
Mostly Fremont and Sublette counties.
Follow the North Platte, Green, Snake, Wind/Bighorn and Powder rivers as natural guides.
No. Printing or copying our maps from this site is not permitted.
Sweetwater County, at about 10,426 square miles.
Hot Springs County, at about 2,004 square miles.
Laramie County, with roughly 102,938 residents.
Niobrara County, with roughly 2,341 residents.
Cheyenne, in Laramie County, with about 65,168 residents.
Laramie and Sweetwater counties, both organized in 1867 as original Dakota Territory counties.
No. ZIP codes cross county lines, so use the county boundaries and seats shown here instead.
Physical Map of Wyoming
Physical map and map image of Wyoming.
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