Albany County area

Albany County, Wyoming covers 4,308.8 square miles: 4,274.2 square miles of land and 34.6 square miles of water. Its county seat is Laramie. An estimated 38,558 people lived there in 2025.

Official Census measurements · GEOID 560012026 Gazetteer · retrieved September 27, 2026
Land area4,274.2 mi²
Water area34.6 mi²
Population (2025)38,558
People per mi²9

County outline

Generalized outline of Albany County, Wyoming
2025 Census cartographic boundary, fitted to this frame. County maps are not at a common scale. The 2026 area measurements below come from the separate Gazetteer release. Map source and limitations.

Where Albany County is located

Albany County highlighted on a map of all U.S. county equivalents. About the maps

Area breakdown

Land accounts for 99.2% of Albany County’s measured area and water for 0.8%. Its combined area converts to 11,159.6 square kilometers or approximately 2,757,601 acres.

Green: land · blue: water

MeasurementSquare milesSquare kilometersAcres
Land4,274.17511,070.0622,735,472
Water34.57789.55422,129.3
Total4,308.75211,159.6162,757,601.3

How Albany County compares

By original Census land area, Albany County ranks #8 of 23 in Wyoming and #108 of 3,222 nationally. National rankings include the 50 states, District of Columbia, and Puerto Rico.

Its land area is 1.069 times the Wyoming county-equivalent median of 3,996.8 square miles. It accounts for 4.4% of the combined county land area in the state.

See the complete Wyoming ranking · What counts as a county equivalent?

Population and density of Albany County

The Census Bureau estimates that 38,558 people lived in Albany County on July 1, 2025. That ranks #1,243 of 3,222 county equivalents nationally and #6 of 23 in Wyoming. Since the April 1, 2020 estimates base of 37,068, the population has grown by 1,490 (+4%), compared with +2.1% for Wyoming as a whole.

With 4,274.2 square miles of land, that is 9 people per square mile (3.5 per km²), placing Albany County #2,679 nationally for density and #6 in Wyoming. The median county equivalent has 47 people per square mile; the Wyoming median is 4.1. Put another way, there are about 71 acres of land per resident.

Estimated population, 2020–2025 · line scaled to this county’s own range
July 1202020212022202320242025
Estimate37,10737,85138,25338,33738,54538,558
Change—+744+402+84+208+13

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 Albany County

2 incorporated places lie at least partly in Albany County. Together they are home to 32,501 people (84.3%); the other 6,057 (15.7%) live outside any incorporated place, in unincorporated communities and rural areas.

The largest is Laramie city, with 32,284 residents in the county.

Incorporated placePopulation 2025Since 2020Land mi²
Laramie cityCounty seat32,284+2.8%18.1
Rock River town217+1.9%2.327

Population: U.S. Census Bureau Vintage 2025 subcounty estimates, counting only the part of each place inside Albany County. Land: 2026 Census Gazetteer, for the whole place even where it extends into other counties. How communities are listed.

Metropolitan area

Albany County is a central county of the Laramie, WY Micropolitan Statistical Area. Albany County is the area’s only county equivalent, so the micro area has the same 4,274.2 square miles of land. By combined land it ranks #33 of 542 micropolitan areas, and #340 by population.

ZIP codes

12 ZIP Code Tabulation Areas have land in Albany County; 9 of them have most of their land inside the county, and the others mainly cover neighboring areas.

820518205282055820588206382070820728207382083820848220182329

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 Albany County

Albany County shares a land border with 6 county equivalents, including 2 in Colorado. It has more land than 5 of them. The largest neighbor is Carbon County (7,897.7 mi²) and the smallest is Jackson County (1,613.7 mi²). Together with its neighbors, Albany County forms a block of 25,403.7 mi² of land, of which it holds 16.8%.

Map of Albany County and the 6 county equivalents that border it Carbon County, Wyoming: 7,897.7 mi² landConverse County, Wyoming: 4,255 mi² landPlatte County, Wyoming: 2,081.5 mi² landLarimer County, Colorado: 2,595.7 mi² landLaramie County, Wyoming: 2,685.9 mi² landJackson County, Colorado: 1,613.7 mi² land
Albany County (dark) and its bordering county equivalents. Select a neighbor to open its profile. Drawn from the 2025 Census cartographic boundaries in an equal-area projection. How borders are determined.
Bordering county equivalentLand mi²Size vs. AlbanyCompare
Carbon County7,897.71.8× largerCompare
Converse County4,255about the sameCompare
Laramie County2,685.91.6× smallerCompare
Larimer CountyColorado2,595.71.6× smallerCompare
Platte County2,081.52.1× smallerCompare
Jackson CountyColorado1,613.72.6× smallerCompare

How big is Albany County compared with U.S. states?

Albany County has more land than 2 of the 50 states. It is about 2.2 times the land area of Delaware (1,948.6 mi²), while Connecticut, the next larger state, has 1.1 times as much land (4,842.5 mi²). Wyoming’s county land could hold about 23 areas the size of Albany County.

Land area: Albany County and the closest-sized states
Delaware1,948.6 mi²
Albany County4,274.2 mi²
Connecticut4,842.5 mi²

Another way to picture it: the same land area would fill a square about 65.4 miles (105.2 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 Albany County?

Albany County has more land than 3,114 of the other 3,221 county equivalents in the dataset.

Land area compared with the typical county equivalent
Albany County4,274.2 mi²
Wyoming median3,996.8 mi²
National median604.5 mi²

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 Albany County at #117 nationally by total area, 9 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 0.8%, compared with a national county-equivalent median of 1.2% — 0.4 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 Albany County in the national ranking. They can be in different states and are not necessarily geographic neighbors.

Land rankCounty equivalentLand mi²Comparison
#107Yakima County, Washington4,294.5Compare
#108Albany County, Wyoming4,274.2This county
#109Converse County, Wyoming4,255Compare

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 41.665514, -105.721883. 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: 11,070,062,779 m²; AWATER: 89,554,044 m². Rankings use ALAND; exact ties use ascending GEOID. Tables preserve Census-published square miles to three decimals, with conversions based on those values.

Download the official county source ZIP ↗ · Methodology

Common questions

How big is Albany County?

Albany County, Wyoming has 4,274.2 square miles (11,070.1 km²) of land and 34.6 square miles of water, for a total area of 4,308.8 square miles. It ranks #108 of 3,222 U.S. county equivalents by land area.

Is Albany County the largest county in Wyoming?

No. Albany County ranks #8 of 23 in Wyoming by land area. The largest is Sweetwater County, with 10,427 square miles of land.

What counties border Albany County?

Albany County shares a land border with Carbon County, Converse County, Platte County, Larimer County, Colorado, Laramie County, and Jackson County, Colorado.

What is the population of Albany County?

The Census Bureau estimates Albany County had 38,558 residents on July 1, 2025, ranking #1,243 of 3,222 county equivalents. That is 9 people per square mile of land.

What is the county seat of Albany County?

The county seat of Albany County is Laramie.

What cities and towns are in Albany County?

Albany County has 2 incorporated places. The most populous are Laramie city and Rock River town; 6,057 residents live outside any incorporated place.

Is Albany County part of a metropolitan area?

Yes. It is a central county of the Laramie, WY Micropolitan Statistical Area.

How many ZIP codes are in Albany County?

12 ZIP Code Tabulation Areas have land in Albany County, and 9 of them have most of their land inside the county. Census ZIP Code Tabulation Areas approximate USPS ZIP Code areas.

How does Albany 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 Albany County?

The land measurement converts to approximately 2,735,472 acres. Including water, total area is approximately 2,757,601 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.

Cite this county

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