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West county atlas

Wyoming county map

Explore all 23 counties. Select a county to see its map, or download a copy for your next project.

2025 Census boundaries23 mapped unitsCapital: Cheyenne
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Boundary map 100%
Labelled map of Wyoming counties Albany CountyBig Horn CountyCampbell CountyCarbon CountyConverse CountyCrook CountyFremont CountyGoshen CountyHot Springs CountyJohnson CountyLaramie CountyLincoln CountyNatrona CountyNiobrara CountyPark CountyPlatte CountySheridan CountySublette CountySweetwater CountyTeton CountyUinta CountyWashakie CountyWeston County
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2025 U.S. Census boundaries. Zoom to reveal more names. Drag to pan when zoomed; use arrow keys, + and − with the map focused.

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SVG

SVG is editable vector artwork. PNG is a high-resolution image. PDF uses landscape Letter pages, with a separate key when needed.

Downloads contain the complete boundary map, independent of zoom. Crowded names use a numbered key. Numbered quiz maps use the county list / answer key (CSV). Boundary data (GeoJSON) · Reuse with source credit.

Roads, terrain & aerial imagery

Explore Wyoming with a county boundary overlay. Choose a view to load the interactive map.

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Street names, terrain, or aerial photography with the county boundary in view.

Backgrounds load from OpenStreetMap or USGS only when selected. Imagery dates and detail vary by location.

Map scope: Use the boundary map for names and shapes, or the interactive background viewer for roads, terrain, and aerial imagery. County boundaries do not identify parcels or ZIP codes.

Wyoming county geography overview

Wyoming has 23 counties, which places it 39th among the 50 state and District of Columbia maps in this atlas when ordered by number of county-level units. Their combined 97,088.6 square miles of land place the state 9th by mapped land area.

The average county-level area is 4,221 square miles, while the median is 3,996.8 square miles. The median is often the better description of a typical unit because one or two very large areas can pull the average upward. The five largest units together account for about 41% of the state’s mapped land area.

23county-level units
3,996.8 sq mimedian land area
10,427 sq milargest unit
1%share of mapped area that is water

Largest and smallest Wyoming counties

Sweetwater County is the largest county-level unit by land area at 10,427 square miles. It represents about 11% of all mapped land in Wyoming. At the other end of the range, Hot Springs County has 2,004.4 square miles of land.

Largest by land area

  1. Sweetwater County10,427 sq mi
  2. Fremont County9,183.6 sq mi
  3. Carbon County7,897.7 sq mi
  4. Park County6,939 sq mi
  5. Natrona County5,340.5 sq mi

Smallest by land area

  1. Hot Springs County2,004.4 sq mi
  2. Platte County2,081.5 sq mi
  3. Uinta County2,081.7 sq mi
  4. Goshen County2,225.6 sq mi
  5. Washakie County2,238.7 sq mi

Rankings use land area rather than total area. This avoids making coastal or lake counties appear larger solely because their boundaries include extensive water.

Alphabetical list of Wyoming counties

The table is alphabetical, so it works as a name and FIPS-code reference rather than an area ranking. Every identifier begins with the Wyoming state FIPS prefix 56. Land and water figures are rounded to one decimal place.

23 county-level areas

Download county data / numbered map key (CSV)
No.NameFIPS codeLand areaWater area
1Albany County560014,274.2 sq mi34.6 sq mi
2Big Horn County560033,137 sq mi21.3 sq mi
3Campbell County560054,802.1 sq mi4.3 sq mi
4Carbon County560077,897.7 sq mi66.2 sq mi
5Converse County560094,255 sq mi10.1 sq mi
6Crook County560112,854.5 sq mi10.9 sq mi
7Fremont County560139,183.6 sq mi82.1 sq mi
8Goshen County560152,225.6 sq mi6.6 sq mi
9Hot Springs County560172,004.4 sq mi2 sq mi
10Johnson County560194,154.2 sq mi20.4 sq mi
11Laramie County560212,685.9 sq mi1.7 sq mi
12Lincoln County560234,075.3 sq mi19.3 sq mi
13Natrona County560255,340.5 sq mi35.1 sq mi
14Niobrara County560272,626 sq mi1.9 sq mi
15Park County560296,939 sq mi26.1 sq mi
16Platte County560312,081.5 sq mi29.4 sq mi
17Sheridan County560332,523.4 sq mi3.1 sq mi
18Sublette County560354,886.5 sq mi49.2 sq mi
19Sweetwater County5603710,427 sq mi64.2 sq mi
20Teton County560393,996.8 sq mi220.4 sq mi
21Uinta County560412,081.7 sq mi6.4 sq mi
22Washakie County560432,238.7 sq mi4 sq mi
23Weston County560452,398 sq mi2 sq mi

How to read and use this map

County lines are administrative boundaries, not postal routes. A mailing address can use a city name associated with a neighboring area, and ZIP codes can cross county lines. When you need to identify a county for an address, confirm it with an official geocoder or local government source.

For classroom or planning use, download a PDF from the controls above. Labelled exports use numbered callouts for crowded areas; numbered quiz maps match the alphabetical county list. SVG files keep the boundary lines sharp at larger paper sizes.

Frequently asked questions

How many counties are in Wyoming?

Wyoming has 23 counties in the U.S. Census Bureau’s 2025 cartographic boundary file.

Can I print this Wyoming county map?

Yes. Choose Download / print and select PDF for a landscape Letter page, PNG for an image, or SVG for editable vector artwork. Because the map is SVG, its boundary lines stay sharp when scaled.

What is the largest county in Wyoming?

Sweetwater County is the largest by land area in this dataset at 10,427 square miles. This is an area ranking, not a population ranking.

What is the smallest county in Wyoming?

Hot Springs County is the smallest by land area in this dataset at 2,004.4 square miles.

Are these legal survey boundaries?

No. This is a generalized reference map. Property, parcel, election, and legal boundary questions should be checked with the relevant state or local agency.

Map source

U.S. Census Bureau, 2025 Cartographic Boundary File, Counties, 1:5,000,000. Land and water area fields are supplied in the same file and converted from square meters to square miles. Accessed September 27, 2026.