County outline
Where Lincoln County is located
Area breakdown
Land accounts for 99.5% of Lincoln County’s measured area and water for 0.5%. Its combined area converts to 10,605 square kilometers or approximately 2,620,558 acres.
Green: land · blue: water
| Measurement | Square miles | Square kilometers | Acres |
|---|---|---|---|
| Land | 4,075.337 | 10,555.074 | 2,608,215.7 |
| Water | 19.285 | 49.948 | 12,342.4 |
| Total | 4,094.622 | 10,605.022 | 2,620,558.1 |
How Lincoln County compares
By original Census land area, Lincoln County ranks #11 of 23 in Wyoming and #117 of 3,222 nationally. National rankings include the 50 states, District of Columbia, and Puerto Rico.
Its land area is 1.02 times the Wyoming county-equivalent median of 3,996.8 square miles. It accounts for 4.2% of the combined county land area in the state.
See the complete Wyoming ranking · What counts as a county equivalent?
Population and density of Lincoln County
The Census Bureau estimates that 21,180 people lived in Lincoln County on July 1, 2025. That ranks #1,824 of 3,222 county equivalents nationally and #10 of 23 in Wyoming. Since the April 1, 2020 estimates base of 19,578, the population has grown by 1,602 (+8.2%), compared with +2.1% for Wyoming as a whole.
With 4,075.3 square miles of land, that is 5.2 people per square mile (2 per km²), placing Lincoln County #2,842 nationally for density and #9 in Wyoming. The median county equivalent has 47 people per square mile; the Wyoming median is 4.1. Put another way, there are about 123 acres of land per resident.
| July 1 | 2020 | 2021 | 2022 | 2023 | 2024 | 2025 |
|---|---|---|---|---|---|---|
| Estimate | 19,654 | 20,171 | 20,674 | 20,893 | 20,988 | 21,180 |
| Change | — | +517 | +503 | +219 | +95 | +192 |
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 Lincoln County
9 incorporated places lie at least partly in Lincoln County. Together they are home to 9,957 people (47%); the other 11,223 (53%) live outside any incorporated place, in unincorporated communities and rural areas.
The largest is Kemmerer city, with 2,353 residents in the county. Among places with at least 1,000 residents in 2020, Alpine town grew fastest since then (+12.6%).
| Incorporated place | Population 2025 | Since 2020 | Land mi² |
|---|---|---|---|
| Kemmerer cityCounty seat | 2,353 | −2.6% | 7.979 |
| Afton town | 2,256 | +4.2% | 4.456 |
| Star Valley Ranch town | 2,074 | +11.3% | 2.701 |
| Alpine town | 1,382 | +12.6% | 1.137 |
| Diamondville town | 513 | −1.5% | 1.06 |
| Cokeville town | 486 | −2.6% | 1.277 |
| Thayne town | 436 | +12.7% | 1.709 |
| La Barge town | 391 | −1.3% | 0.942 |
| Opal town | 66 | +3.1% | 0.457 |
Population: U.S. Census Bureau Vintage 2025 subcounty estimates, counting only the part of each place inside Lincoln County. Land: 2026 Census Gazetteer, for the whole place even where it extends into other counties. How communities are listed.
Metropolitan area
Lincoln County is not part of any metropolitan or micropolitan statistical area in the Office of Management and Budget’s July 2023 delineation; 1,306 other county equivalents are also outside one. These areas are built around an urban core of at least 10,000 people plus the counties tied to it by commuting, so counties outside them are generally rural.
ZIP codes
16 ZIP Code Tabulation Areas have land in Lincoln County; 15 of them have most of their land inside the county, and the others mainly cover neighboring areas.
83101831108311183112831148311683118831198312083121831228312383124831268312783128
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 Lincoln County
Lincoln County shares a land border with 8 county equivalents, including 4 in Idaho and Utah. It has more land than 6 of them. The largest neighbor is Sweetwater County (10,427 mi²) and the smallest is Bear Lake County (975.7 mi²). Together with its neighbors, Lincoln County forms a block of 31,102 mi² of land, of which it holds 13.1%.
| Bordering county equivalent | Land mi² | Size vs. Lincoln | Compare |
|---|---|---|---|
| Sweetwater County | 10,427 | 2.6× larger | Compare |
| Sublette County | 4,886.5 | 1.2× larger | Compare |
| Teton County | 3,996.8 | about the same | Compare |
| Uinta County | 2,081.7 | 2× smaller | Compare |
| Bonneville CountyIdaho | 1,866 | 2.2× smaller | Compare |
| Caribou CountyIdaho | 1,764.2 | 2.3× smaller | Compare |
| Rich CountyUtah | 1,028.8 | 4× smaller | Compare |
| Bear Lake CountyIdaho | 975.7 | 4.2× smaller | Compare |
How big is Lincoln County compared with U.S. states?
Lincoln County has more land than 2 of the 50 states. It is about 2.1 times the land area of Delaware (1,948.6 mi²), while Connecticut, the next larger state, has 1.2 times as much land (4,842.5 mi²). Wyoming’s county land could hold about 24 areas the size of Lincoln County.
Another way to picture it: the same land area would fill a square about 63.8 miles (102.7 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 Lincoln County?
Lincoln County has more land than 3,105 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 Lincoln County at #127 nationally by total area, 10 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 0.5%, compared with a national county-equivalent median of 1.2% — 0.7 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 Lincoln County in the national ranking. They can be in different states and are not necessarily geographic neighbors.
| Land rank | County equivalent | Land mi² | Comparison |
|---|---|---|---|
| #116 | Johnson County, Wyoming | 4,154.2 | Compare |
| #117 | Lincoln County, Wyoming | 4,075.3 | This county |
| #118 | Los Angeles County, California | 4,060.3 | 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 42.229993, -110.682961. 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: 10,555,073,818 m²; AWATER: 49,947,330 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 Lincoln County?
Lincoln County, Wyoming has 4,075.3 square miles (10,555.1 km²) of land and 19.3 square miles of water, for a total area of 4,094.6 square miles. It ranks #117 of 3,222 U.S. county equivalents by land area.
Is Lincoln County the largest county in Wyoming?
No. Lincoln County ranks #11 of 23 in Wyoming by land area. The largest is Sweetwater County, with 10,427 square miles of land.
What counties border Lincoln County?
Lincoln County shares a land border with Sublette County, Uinta County, Sweetwater County, Bear Lake County, Idaho, Caribou County, Idaho, Rich County, Utah, Teton County, and Bonneville County, Idaho.
What is the population of Lincoln County?
The Census Bureau estimates Lincoln County had 21,180 residents on July 1, 2025, ranking #1,824 of 3,222 county equivalents. That is 5.2 people per square mile of land.
What is the county seat of Lincoln County?
The county seat of Lincoln County is Kemmerer.
What cities and towns are in Lincoln County?
Lincoln County has 9 incorporated places. The most populous five are Kemmerer city, Afton town, Star Valley Ranch town, Alpine town, and Diamondville town; 11,223 residents live outside any incorporated place.
Is Lincoln County part of a metropolitan area?
No. Lincoln County is outside every metropolitan and micropolitan statistical area in the July 2023 OMB delineation.
How many ZIP codes are in Lincoln County?
16 ZIP Code Tabulation Areas have land in Lincoln County, and 15 of them have most of their land inside the county. Census ZIP Code Tabulation Areas approximate USPS ZIP Code areas.
How does Lincoln 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 Lincoln County?
The land measurement converts to approximately 2,608,216 acres. Including water, total area is approximately 2,620,558 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.