Wyoming County Map With Cities
By Marko Visic · Updated Oct 5, 2026
Wyoming has 23 counties, covering 97,089 square miles of land. The Census Bureau estimates its population at 588,753 as of July 1, 2025. The largest county by land area is Sweetwater County; the most populous is Laramie County; the least populous is Niobrara County.
Tap or click any county for details. Need a printable version? Blank Wyoming map (PDF/PNG/SVG).
All 23 Wyoming counties
| County | FIPS code | Population (July 1, 2025) ▼ | Change since April 2020 | Land area (sq mi) | People per sq mi | Median household income (2020–2024) |
|---|---|---|---|---|---|---|
| Laramie County | 56021 | 102,938 | +2.4% | 2,686 | 38 | $80,173 |
| Natrona County | 56025 | 80,526 | +0.7% | 5,341 | 15 | $72,156 |
| Campbell County | 56005 | 48,145 | +2.4% | 4,802 | 10 | $89,869 |
| Sweetwater County | 56037 | 41,267 | -2.4% | 10,427 | 4 | $75,034 |
| Fremont County | 56013 | 39,464 | +0.6% | 9,184 | 4 | $64,904 |
| Albany County | 56001 | 38,558 | +4.0% | 4,274 | 9 | $61,917 |
| Sheridan County | 56033 | 33,241 | +7.5% | 2,523 | 13 | $71,388 |
| Park County | 56029 | 31,171 | +5.2% | 6,939 | 4 | $73,035 |
| Teton County | 56039 | 23,333 | 0.0% | 3,997 | 6 | $124,172 |
| Lincoln County | 56023 | 21,180 | +8.2% | 4,075 | 5 | $89,330 |
| Uinta County | 56041 | 20,728 | +1.4% | 2,082 | 10 | $82,980 |
| Carbon County | 56007 | 14,013 | -3.6% | 7,898 | 2 | $70,511 |
| Converse County | 56009 | 13,824 | +0.5% | 4,255 | 3 | $81,558 |
| Goshen County | 56015 | 12,640 | +1.1% | 2,226 | 6 | $58,929 |
| Big Horn County | 56003 | 12,024 | +4.4% | 3,137 | 4 | $62,101 |
| Sublette County | 56035 | 8,929 | +2.3% | 4,886 | 2 | $83,597 |
| Johnson County | 56019 | 8,908 | +5.4% | 4,154 | 2 | $64,871 |
| Platte County | 56031 | 8,634 | +0.4% | 2,081 | 4 | $67,718 |
| Crook County | 56011 | 7,852 | +9.3% | 2,854 | 3 | $79,637 |
| Washakie County | 56043 | 7,597 | -1.1% | 2,239 | 3 | $65,714 |
| Weston County | 56045 | 6,840 | 0.0% | 2,398 | 3 | $89,509 |
| Hot Springs County | 56017 | 4,600 | -0.4% | 2,004 | 2 | $61,250 |
| Niobrara County | 56027 | 2,341 | -5.1% | 2,626 | 1 | $64,113 |
FIPS code: the Census Bureau’s five-digit county ID, a two-digit state code plus a three-digit county code. It is not a ZIP code.
How many counties does Wyoming have?
Wyoming has 23 counties covering 97,089 square miles. The state was admitted to the Union in 1890 as the 44th state.
The largest county by land area is Sweetwater County at 10,427 square miles, home to 41,267 residents. The most populous is Laramie County with 102,938 residents — a density of 38 people per square mile. At the other end of the scale, Niobrara County has 2,341 residents.
Cheyenne is both the state capital and the largest city in Wyoming.
Related resources
Download a printable outline of Wyoming’s county boundaries from our blank map of Wyoming page — available in SVG, PNG, and PDF.
Use the What County Am I In? tool to detect which Wyoming county a GPS location or address falls in, or the Address to County Lookup for batch input.
For demographic radius analysis, the Find ZIP Codes in Radius and Population Within Radius tools let you draw a circle around any Wyoming address and see every ZIP code and the total population inside.
Two SimpleMapLab studies cover Wyoming specifically: the 100-mile radius around Cheyenne measures how much of the state lives within 100 miles of its capitol, and the loneliest town in Wyoming ranks the state’s most isolated inhabited place. The county-counts blog post puts Wyoming’s 23 counties in national context.
Frequently asked questions
- County Population Totals, Vintage 2025: estimates for July 1, 2025, released March 2026
- Gazetteer Files, 2026: county land and water area
- American Community Survey 5-Year Estimates, 2020–2024: median household income (table B19013)
- County boundaries on the map: US Atlas TopoJSON build of the US Census Bureau’s TIGER/Line shapefiles. All figures are US Census Bureau data in the public domain.