County outline
Where Ouray County is located
Area breakdown
Land accounts for 99.7% of Ouray County’s measured area and water for 0.3%. Its combined area converts to 1,404.3 square kilometers or approximately 347,014 acres.
Green: land · blue: water
| Measurement | Square miles | Square kilometers | Acres |
|---|---|---|---|
| Land | 540.671 | 1,400.331 | 346,029.4 |
| Water | 1.539 | 3.986 | 985 |
| Total | 542.21 | 1,404.317 | 347,014.4 |
How Ouray County compares
By original Census land area, Ouray County ranks #58 of 64 in Colorado and #1933 of 3,222 nationally. National rankings include the 50 states, District of Columbia, and Puerto Rico.
Its land area is 0.378 times the Colorado county-equivalent median of 1,431.5 square miles. It accounts for 0.5% of the combined county land area in the state.
See the complete Colorado ranking · What counts as a county equivalent?
Population and density of Ouray County
The Census Bureau estimates that 5,265 people lived in Ouray County on July 1, 2025. That ranks #2,877 of 3,222 county equivalents nationally and #52 of 64 in Colorado. Since the April 1, 2020 estimates base of 4,879, the population has grown by 386 (+7.9%), compared with +4.1% for Colorado as a whole.
With 540.7 square miles of land, that is 9.7 people per square mile (3.8 per km²), placing Ouray County #2,653 nationally for density and #35 in Colorado. The median county equivalent has 47 people per square mile; the Colorado median is 11. Put another way, there are about 66 acres of land per resident.
| July 1 | 2020 | 2021 | 2022 | 2023 | 2024 | 2025 |
|---|---|---|---|---|---|---|
| Estimate | 4,879 | 5,059 | 5,095 | 5,167 | 5,173 | 5,265 |
| Change | — | +180 | +36 | +72 | +6 | +92 |
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 Ouray County
2 incorporated places lie at least partly in Ouray County. Together they are home to 2,253 people (42.8%); the other 3,012 (57.2%) live outside any incorporated place, in unincorporated communities and rural areas.
The largest is Ridgway town, with 1,324 residents in the county. The county seat, Ouray city, has 929 residents.
| Incorporated place | Population 2025 | Since 2020 | Land mi² |
|---|---|---|---|
| Ridgway town | 1,324 | +12.2% | 1.848 |
| Ouray cityCounty seat | 929 | +3.3% | 0.863 |
Population: U.S. Census Bureau Vintage 2025 subcounty estimates, counting only the part of each place inside Ouray County. Land: 2026 Census Gazetteer, for the whole place even where it extends into other counties. How communities are listed.
Metropolitan area
Ouray 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
3 ZIP Code Tabulation Areas have land in Ouray County; 2 of them have most of their land inside the county, and the others mainly cover neighboring areas.
814038142781432
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 Ouray County
Ouray County shares a land border with 5 county equivalents. It has more land than 1 of them. The largest neighbor is Gunnison County (3,239.1 mi²) and the smallest is San Juan County (387.5 mi²). Together with its neighbors, Ouray County forms a block of 8,812.2 mi² of land, of which it holds 6.1%.
| Bordering county equivalent | Land mi² | Size vs. Ouray | Compare |
|---|---|---|---|
| Gunnison County | 3,239.1 | 6× larger | Compare |
| Montrose County | 2,240.9 | 4.1× larger | Compare |
| San Miguel County | 1,286.7 | 2.4× larger | Compare |
| Hinsdale County | 1,117.2 | 2.1× larger | Compare |
| San Juan County | 387.5 | 1.4× smaller | Compare |
How big is Ouray County compared with U.S. states?
Ouray County has less land than any of the 50 states. Rhode Island, the smallest state by land area, has 1,033.9 mi², about 1.9 times as much. Colorado’s county land could hold about 192 areas the size of Ouray County.
Another way to picture it: the same land area would fill a square about 23.3 miles (37.4 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 Ouray County?
Ouray County has more land than 1,289 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 Ouray County at #2,034 nationally by total area, 101 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 0.3%, compared with a national county-equivalent median of 1.2% — 0.9 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 Ouray County in the national ranking. They can be in different states and are not necessarily geographic neighbors.
| Land rank | County equivalent | Land mi² | Comparison |
|---|---|---|---|
| #1932 | Dorchester County, Maryland | 540.8 | Compare |
| #1933 | Ouray County, Colorado | 540.7 | This county |
| #1934 | Nash County, North Carolina | 540.4 | 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 38.154731, -107.788480. 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: 1,400,332,580 m²; AWATER: 3,986,292 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 Ouray County?
Ouray County, Colorado has 540.7 square miles (1,400.3 km²) of land and 1.539 square miles of water, for a total area of 542.2 square miles. It ranks #1933 of 3,222 U.S. county equivalents by land area.
Is Ouray County the largest county in Colorado?
No. Ouray County ranks #58 of 64 in Colorado by land area. The largest is Las Animas County, with 4,772.9 square miles of land.
What counties border Ouray County?
Ouray County shares a land border with Montrose County, San Miguel County, Hinsdale County, Gunnison County, and San Juan County.
What is the population of Ouray County?
The Census Bureau estimates Ouray County had 5,265 residents on July 1, 2025, ranking #2,877 of 3,222 county equivalents. That is 9.7 people per square mile of land.
What is the county seat of Ouray County?
The county seat of Ouray County is Ouray.
What cities and towns are in Ouray County?
Ouray County has 2 incorporated places. The most populous are Ridgway town and Ouray city; 3,012 residents live outside any incorporated place.
Is Ouray County part of a metropolitan area?
No. Ouray County is outside every metropolitan and micropolitan statistical area in the July 2023 OMB delineation.
How many ZIP codes are in Ouray County?
3 ZIP Code Tabulation Areas have land in Ouray County, and 2 of them have most of their land inside the county. Census ZIP Code Tabulation Areas approximate USPS ZIP Code areas.
How does Ouray County compare with U.S. states?
It has less land than every state. Rhode Island, the smallest, has 1.9 times as much land.
How many acres of land are in Ouray County?
The land measurement converts to approximately 346,029 acres. Including water, total area is approximately 347,014 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.