County outline
Where Eagle County is located
Area breakdown
Land accounts for 99.6% of Eagle County’s measured area and water for 0.4%. Its combined area converts to 4,381.7 square kilometers or approximately 1,082,748 acres.
Green: land · blue: water
| Measurement | Square miles | Square kilometers | Acres |
|---|---|---|---|
| Land | 1,684.469 | 4,362.755 | 1,078,060.2 |
| Water | 7.325 | 18.972 | 4,688 |
| Total | 1,691.794 | 4,381.726 | 1,082,748.2 |
How Eagle County compares
By original Census land area, Eagle County ranks #27 of 64 in Colorado and #358 of 3,222 nationally. National rankings include the 50 states, District of Columbia, and Puerto Rico.
Its land area is 1.177 times the Colorado county-equivalent median of 1,431.5 square miles. It accounts for 1.6% of the combined county land area in the state.
See the complete Colorado ranking · What counts as a county equivalent?
Population and density of Eagle County
The Census Bureau estimates that 54,291 people lived in Eagle County on July 1, 2025. That ranks #970 of 3,222 county equivalents nationally and #15 of 64 in Colorado. Since the April 1, 2020 estimates base of 55,721, the population has declined by 1,430 (−2.6%), compared with +4.1% for Colorado as a whole.
With 1,684.5 square miles of land, that is 32 people per square mile (12 per km²), placing Eagle County #1,942 nationally for density and #18 in Colorado. The median county equivalent has 47 people per square mile; the Colorado median is 11. Put another way, there are about 20 acres of land per resident.
| July 1 | 2020 | 2021 | 2022 | 2023 | 2024 | 2025 |
|---|---|---|---|---|---|---|
| Estimate | 55,657 | 55,786 | 55,347 | 54,807 | 54,635 | 54,291 |
| Change | — | +129 | −439 | −540 | −172 | −344 |
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 Eagle County
7 incorporated places lie at least partly in Eagle County. Together they are home to 31,232 people (57.5%); the other 23,059 (42.5%) live outside any incorporated place, in unincorporated communities and rural areas.
The largest is Gypsum town, with 9,212 residents in the county. The county seat, Eagle town, has 7,280 residents. Among places with at least 1,000 residents in 2020, Gypsum town grew fastest since then (+14.2%).
| Incorporated place | Population 2025 | Since 2020 | Land mi² |
|---|---|---|---|
| Gypsum town | 9,212 | +14.2% | 8.885 |
| Eagle townCounty seat | 7,280 | −3.1% | 5.818 |
| Avon town | 6,184 | +1.9% | 8.194 |
| Vail town | 4,407 | −9.2% | 4.712 |
| Basalt townAlso in 1 other county | 2,925 | +0.1% | 2.022 |
| Minturn town | 986 | −5.4% | 7.457 |
| Red Cliff town | 238 | −7.8% | 0.244 |
Population: U.S. Census Bureau Vintage 2025 subcounty estimates, counting only the part of each place inside Eagle County. Land: 2026 Census Gazetteer, for the whole place even where it extends into other counties. How communities are listed.
Metropolitan area
Eagle County is a central county of the Edwards, CO Micropolitan Statistical Area. Eagle County is the area’s only county equivalent, so the micro area has the same 1,684.5 square miles of land. By combined land it ranks #97 of 542 micropolitan areas, and #198 by population. It belongs to the Edwards-Rifle, CO Combined Statistical Area.
ZIP codes
13 ZIP Code Tabulation Areas have land in Eagle County; 10 of them have most of their land inside the county, and the others mainly cover neighboring areas.
80423804268046381620816218162381631816328163781645816498165581657
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 Eagle County
Eagle County shares a land border with 6 county equivalents. It has more land than 3 of them. The largest neighbor is Garfield County (2,947.4 mi²) and the smallest is Lake County (376.9 mi²). Together with its neighbors, Eagle County forms a block of 10,796.4 mi² of land, of which it holds 15.6%.
| Bordering county equivalent | Land mi² | Size vs. Eagle | Compare |
|---|---|---|---|
| Garfield County | 2,947.4 | 1.7× larger | Compare |
| Routt County | 2,362 | 1.4× larger | Compare |
| Grand County | 1,846.6 | 1.1× larger | Compare |
| Pitkin County | 970.7 | 1.7× smaller | Compare |
| Summit County | 608.3 | 2.8× smaller | Compare |
| Lake County | 376.9 | 4.5× smaller | Compare |
How big is Eagle County compared with U.S. states?
Eagle County has more land than 1 of the 50 states. It is about 1.6 times the land area of Rhode Island (1,033.9 mi²), while Delaware, the next larger state, has 1.2 times as much land (1,948.6 mi²). Colorado’s county land could hold about 62 areas the size of Eagle County.
Another way to picture it: the same land area would fill a square about 41 miles (66.1 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 Eagle County?
Eagle County has more land than 2,864 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 Eagle County at #398 nationally by total area, 40 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 0.4%, 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 Eagle County in the national ranking. They can be in different states and are not necessarily geographic neighbors.
| Land rank | County equivalent | Land mi² | Comparison |
|---|---|---|---|
| #357 | La Plata County, Colorado | 1,689.7 | Compare |
| #358 | Eagle County, Colorado | 1,684.5 | This county |
| #359 | Sheridan County, Montana | 1,676.9 | 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 39.626992, -106.695169. 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: 4,362,754,156 m²; AWATER: 18,970,726 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 Eagle County?
Eagle County, Colorado has 1,684.5 square miles (4,362.8 km²) of land and 7.325 square miles of water, for a total area of 1,691.8 square miles. It ranks #358 of 3,222 U.S. county equivalents by land area.
Is Eagle County the largest county in Colorado?
No. Eagle County ranks #27 of 64 in Colorado by land area. The largest is Las Animas County, with 4,772.9 square miles of land.
What counties border Eagle County?
Eagle County shares a land border with Summit County, Garfield County, Pitkin County, Routt County, Lake County, and Grand County.
What is the population of Eagle County?
The Census Bureau estimates Eagle County had 54,291 residents on July 1, 2025, ranking #970 of 3,222 county equivalents. That is 32 people per square mile of land.
What is the county seat of Eagle County?
The county seat of Eagle County is Eagle.
What cities and towns are in Eagle County?
Eagle County has 7 incorporated places. The most populous five are Gypsum town, Eagle town, Avon town, Vail town, and Basalt town; 23,059 residents live outside any incorporated place.
Is Eagle County part of a metropolitan area?
Yes. It is a central county of the Edwards, CO Micropolitan Statistical Area.
How many ZIP codes are in Eagle County?
13 ZIP Code Tabulation Areas have land in Eagle County, and 10 of them have most of their land inside the county. Census ZIP Code Tabulation Areas approximate USPS ZIP Code areas.
How does Eagle County compare with U.S. states?
It has more land than 1 of the 50 states, including Rhode Island (1,033.9 square miles of land).
How many acres of land are in Eagle County?
The land measurement converts to approximately 1,078,060 acres. Including water, total area is approximately 1,082,748 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.