County outline
Where Donley County is located
Area breakdown
Land accounts for 99.4% of Donley County’s measured area and water for 0.6%. Its combined area converts to 2,416.6 square kilometers or approximately 597,149 acres.
Green: land · blue: water
| Measurement | Square miles | Square kilometers | Acres |
|---|---|---|---|
| Land | 927.037 | 2,401.015 | 593,303.7 |
| Water | 6.009 | 15.563 | 3,845.8 |
| Total | 933.046 | 2,416.578 | 597,149.4 |
How Donley County compares
By original Census land area, Donley County ranks #100 of 254 in Texas and #780 of 3,222 nationally. National rankings include the 50 states, District of Columbia, and Puerto Rico.
Its land area is 1.02 times the Texas county-equivalent median of 908.7 square miles. It accounts for 0.4% of the combined county land area in the state.
See the complete Texas ranking · What counts as a county equivalent?
Population and density of Donley County
The Census Bureau estimates that 3,213 people lived in Donley County on July 1, 2025. That ranks #3,017 of 3,222 county equivalents nationally and #215 of 254 in Texas. Since the April 1, 2020 estimates base of 3,258, the population has declined by 45 (−1.4%), compared with +8.8% for Texas as a whole.
With 927 square miles of land, that is 3.5 people per square mile (1.3 per km²), placing Donley County #2,947 nationally for density and #213 in Texas. The median county equivalent has 47 people per square mile; the Texas median is 22. Put another way, there are about 185 acres of land per resident.
| July 1 | 2020 | 2021 | 2022 | 2023 | 2024 | 2025 |
|---|---|---|---|---|---|---|
| Estimate | 3,276 | 3,355 | 3,276 | 3,188 | 3,219 | 3,213 |
| Change | — | +79 | −79 | −88 | +31 | −6 |
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 Donley County
3 incorporated places lie at least partly in Donley County. Together they are home to 2,494 people (77.6%); the other 719 (22.4%) live outside any incorporated place, in unincorporated communities and rural areas.
The largest is Clarendon city, with 1,860 residents in the county.
| Incorporated place | Population 2025 | Since 2020 | Land mi² |
|---|---|---|---|
| Clarendon cityCounty seat | 1,860 | −1.1% | 2.994 |
| Howardwick city | 370 | +1.6% | 2.025 |
| Hedley city | 264 | −3.6% | 0.714 |
Population: U.S. Census Bureau Vintage 2025 subcounty estimates, counting only the part of each place inside Donley County. Land: 2026 Census Gazetteer, for the whole place even where it extends into other counties. How communities are listed.
Metropolitan area
Donley 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
6 ZIP Code Tabulation Areas have land in Donley County; 3 of them have most of their land inside the county, and the others mainly cover neighboring areas.
790397905779226792377924079245
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 Donley County
Donley County shares a land border with 5 county equivalents. It has more land than every one of them. The largest neighbor is Gray County (926 mi²) and the smallest is Hall County (883.5 mi²). Together with its neighbors, Donley County forms a block of 5,464.1 mi² of land, of which it holds 17%.
| Bordering county equivalent | Land mi² | Size vs. Donley | Compare |
|---|---|---|---|
| Gray County | 926 | about the same | Compare |
| Collingsworth County | 918.4 | about the same | Compare |
| Armstrong County | 909.1 | about the same | Compare |
| Briscoe County | 900 | about the same | Compare |
| Hall County | 883.5 | about the same | Compare |
How big is Donley County compared with U.S. states?
Donley County has less land than any of the 50 states. Rhode Island, the smallest state by land area, has 1,033.9 mi², about 1.1 times as much. Texas’s county land could hold about 282 areas the size of Donley County.
Another way to picture it: the same land area would fill a square about 30.4 miles (49 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 Donley County?
Donley County has more land than 2,442 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 Donley County at #875 nationally by total area, 95 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 0.6%, compared with a national county-equivalent median of 1.2% — 0.5 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 Donley County in the national ranking. They can be in different states and are not necessarily geographic neighbors.
| Land rank | County equivalent | Land mi² | Comparison |
|---|---|---|---|
| #779 | Howell County, Missouri | 927.2 | Compare |
| #780 | Donley County, Texas | 927 | This county |
| #781 | Berkshire County, Massachusetts | 926.9 | 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 34.955036, -100.815846. 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: 2,401,014,222 m²; AWATER: 15,563,757 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 Donley County?
Donley County, Texas has 927 square miles (2,401 km²) of land and 6.009 square miles of water, for a total area of 933 square miles. It ranks #780 of 3,222 U.S. county equivalents by land area.
Is Donley County the largest county in Texas?
No. Donley County ranks #100 of 254 in Texas by land area. The largest is Brewster County, with 6,183.8 square miles of land.
What counties border Donley County?
Donley County shares a land border with Gray County, Collingsworth County, Armstrong County, Hall County, and Briscoe County.
What is the population of Donley County?
The Census Bureau estimates Donley County had 3,213 residents on July 1, 2025, ranking #3,017 of 3,222 county equivalents. That is 3.5 people per square mile of land.
What is the county seat of Donley County?
The county seat of Donley County is Clarendon.
What cities and towns are in Donley County?
Donley County has 3 incorporated places. The most populous are Clarendon city, Howardwick city, and Hedley city; 719 residents live outside any incorporated place.
Is Donley County part of a metropolitan area?
No. Donley County is outside every metropolitan and micropolitan statistical area in the July 2023 OMB delineation.
How many ZIP codes are in Donley County?
6 ZIP Code Tabulation Areas have land in Donley County, and 3 of them have most of their land inside the county. Census ZIP Code Tabulation Areas approximate USPS ZIP Code areas.
How does Donley County compare with U.S. states?
It has less land than every state. Rhode Island, the smallest, has 1.1 times as much land.
How many acres of land are in Donley County?
The land measurement converts to approximately 593,304 acres. Including water, total area is approximately 597,149 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.