County outline
Where Laramie County is located
Area breakdown
Land accounts for 99.9% of Laramie County’s measured area and water for 0.1%. Its combined area converts to 6,960.7 square kilometers or approximately 1,720,028 acres.
Green: land · blue: water
| Measurement | Square miles | Square kilometers | Acres |
|---|---|---|---|
| Land | 2,685.864 | 6,956.356 | 1,718,953 |
| Water | 1.679 | 4.349 | 1,074.6 |
| Total | 2,687.543 | 6,960.704 | 1,720,027.5 |
How Laramie County compares
By original Census land area, Laramie County ranks #15 of 23 in Wyoming and #193 of 3,222 nationally. National rankings include the 50 states, District of Columbia, and Puerto Rico.
Its land area is 0.672 times the Wyoming county-equivalent median of 3,996.8 square miles. It accounts for 2.8% of the combined county land area in the state.
See the complete Wyoming ranking · What counts as a county equivalent?
Population and density of Laramie County
The Census Bureau estimates that 102,938 people lived in Laramie County on July 1, 2025. That ranks #615 of 3,222 county equivalents nationally and #1 of 23 in Wyoming. Since the April 1, 2020 estimates base of 100,511, the population has grown by 2,427 (+2.4%), compared with +2.1% for Wyoming as a whole.
With 2,685.9 square miles of land, that is 38 people per square mile (15 per km²), placing Laramie County #1,788 nationally for density and #1 in Wyoming. The median county equivalent has 47 people per square mile; the Wyoming median is 4.1. Put another way, there are about 17 acres of land per resident.
| July 1 | 2020 | 2021 | 2022 | 2023 | 2024 | 2025 |
|---|---|---|---|---|---|---|
| Estimate | 100,727 | 100,826 | 100,806 | 100,995 | 101,687 | 102,938 |
| Change | — | +99 | −20 | +189 | +692 | +1,251 |
U.S. Census Bureau, Vintage 2025 population estimates. Estimates are revised each year and are not decennial census counts. Density divides the whole population by the whole county’s land area, so it describes an average, not how settlement is distributed within the county. Population sources and methods.
Cities and towns in Laramie County
4 incorporated places lie at least partly in Laramie County. Together they are home to 68,178 people (66.2%); the other 34,760 (33.8%) live outside any incorporated place, in unincorporated communities and rural areas.
The largest is Cheyenne city, with 66,507 residents in the county. Among places with at least 1,000 residents in 2020, Cheyenne city grew fastest since then (+1.7%).
| Incorporated place | Population 2025 | Since 2020 | Land mi² |
|---|---|---|---|
| Cheyenne cityCounty seat | 66,507 | +1.7% | 40.3 |
| Pine Bluffs town | 1,111 | −4.3% | 3.974 |
| Burns town | 399 | +13% | 3.052 |
| Albin town | 161 | −4.7% | 0.147 |
Population: U.S. Census Bureau Vintage 2025 subcounty estimates, counting only the part of each place inside Laramie County. Land: 2026 Census Gazetteer, for the whole place even where it extends into other counties. How communities are listed.
Metropolitan area
Laramie County is a central county of the Cheyenne, WY Metropolitan Statistical Area. Laramie County is the area’s only county equivalent, so the metro area has the same 2,685.9 square miles of land. By combined land it ranks #117 of 393 metropolitan areas, and #363 by population.
ZIP codes
13 ZIP Code Tabulation Areas have land in Laramie County; 12 of them have most of their land inside the county, and the others mainly cover neighboring areas.
82001820058200782009820508205382054820598206082061820818208282221
ZIP Code Tabulation Areas are the Census Bureau’s approximations of USPS ZIP Code service areas, from the 2020 Census relationship files. Lighter codes have less than half of their land in this county. Post-office-box and single-address ZIP Codes have no tabulation area.
Counties bordering Laramie County
Laramie County shares a land border with 7 county equivalents, including 4 in Colorado and Nebraska. It has more land than 5 of them. The largest neighbor is Albany County (4,274.2 mi²) and the smallest is Banner County (746 mi²). Together with its neighbors, Laramie County forms a block of 19,545.8 mi² of land, of which it holds 13.7%.
| Bordering county equivalent | Land mi² | Size vs. Laramie | Compare |
|---|---|---|---|
| Albany County | 4,274.2 | 1.6× larger | Compare |
| Weld CountyColorado | 3,985 | 1.5× larger | Compare |
| Larimer CountyColorado | 2,595.7 | about the same | Compare |
| Goshen County | 2,225.6 | 1.2× smaller | Compare |
| Platte County | 2,081.5 | 1.3× smaller | Compare |
| Kimball CountyNebraska | 951.9 | 2.8× smaller | Compare |
| Banner CountyNebraska | 746 | 3.6× smaller | Compare |
How big is Laramie County compared with U.S. states?
Laramie County has more land than 2 of the 50 states. It is about 1.4 times the land area of Delaware (1,948.6 mi²), while Connecticut, the next larger state, has 1.8 times as much land (4,842.5 mi²). Wyoming’s county land could hold about 36 areas the size of Laramie County.
Another way to picture it: the same land area would fill a square about 51.8 miles (83.4 km) on each side. Real county shapes are rarely square, so this is a scale reference rather than a width or driving distance.
State figures are the sums of each state’s county-equivalent land measurements in the same Census release, so states and counties are compared on the same basis. Published state totals can differ slightly because of rounding. Compare all states · Counties bigger than entire states.
What stands out about Laramie County?
Laramie County has more land than 3,029 of the other 3,221 county equivalents in the dataset.
A median is the middle county-equivalent measurement, not the average of the largest and smallest. All three bars use the same linear scale. Very small areas may appear as a thin sliver; the labels retain their values.
Does including water change its rank?
Using land plus water places Laramie County at #208 nationally by total area, 15 places farther from the top than its land rank. Other county equivalents gain more area when their water measurements are included.
Its water share is 0.1%, compared with a national county-equivalent median of 1.2% — 1.1 percentage points lower. This describes the statistical geography’s land/water mix, not flood exposure or developable land.
Closest positions in the national land ranking
These entries sit immediately beside Laramie County in the national ranking. They can be in different states and are not necessarily geographic neighbors.
| Land rank | County equivalent | Land mi² | Comparison |
|---|---|---|---|
| #192 | Cascade County, Montana | 2,698.2 | Compare |
| #193 | Laramie County, Wyoming | 2,685.9 | This county |
| #194 | Grant County, Washington | 2,679.6 | Compare |
Calculated from the same Census release as the area table. Total-area order uses original ALAND + AWATER; water shares and chart labels use published square miles. Calculation details.
Representative coordinates
The Census internal point is 41.292830, -104.660395. It represents a location inside the geography; it is not necessarily the centroid or the address of a courthouse.
Source and precision
U.S. Census Bureau, 2026 Gazetteer Files, Counties. Original ALAND: 6,956,354,985 m²; AWATER: 4,348,085 m². Rankings use ALAND; exact ties use ascending GEOID. Tables preserve Census-published square miles to three decimals, with conversions based on those values.
Common questions
How big is Laramie County?
Laramie County, Wyoming has 2,685.9 square miles (6,956.4 km²) of land and 1.679 square miles of water, for a total area of 2,687.5 square miles. It ranks #193 of 3,222 U.S. county equivalents by land area.
Is Laramie County the largest county in Wyoming?
No. Laramie County ranks #15 of 23 in Wyoming by land area. The largest is Sweetwater County, with 10,427 square miles of land.
What counties border Laramie County?
Laramie County shares a land border with Weld County, Colorado, Albany County, Goshen County, Platte County, Kimball County, Nebraska, Larimer County, Colorado, and Banner County, Nebraska.
What is the population of Laramie County?
The Census Bureau estimates Laramie County had 102,938 residents on July 1, 2025, ranking #615 of 3,222 county equivalents. That is 38 people per square mile of land.
What is the county seat of Laramie County?
The county seat of Laramie County is Cheyenne.
What cities and towns are in Laramie County?
Laramie County has 4 incorporated places. The most populous are Cheyenne city, Pine Bluffs town, Burns town, and Albin town; 34,760 residents live outside any incorporated place.
Is Laramie County part of a metropolitan area?
Yes. It is a central county of the Cheyenne, WY Metropolitan Statistical Area.
How many ZIP codes are in Laramie County?
13 ZIP Code Tabulation Areas have land in Laramie County, and 12 of them have most of their land inside the county. Census ZIP Code Tabulation Areas approximate USPS ZIP Code areas.
How does Laramie County compare with U.S. states?
It has more land than 2 of the 50 states, including Delaware (1,948.6 square miles of land).
How many acres of land are in Laramie County?
The land measurement converts to approximately 1,718,953 acres. Including water, total area is approximately 1,720,028 acres. One square mile equals 640 acres.
Why might another source show a different area?
Check whether it reports land or total area, its Census vintage, and its rounding. Our guide explains how to reconcile county area figures.
Can this establish a property boundary?
No. Statistical measurements and generalized maps do not establish property lines. Consult the relevant local surveying or land-records authority.