County outline
Where Hardeman County is located
Area breakdown
Land accounts for 99.7% of Hardeman County’s measured area and water for 0.3%. Its combined area converts to 1,804.9 square kilometers or approximately 445,997 acres.
Green: land · blue: water
| Measurement | Square miles | Square kilometers | Acres |
|---|---|---|---|
| Land | 695.112 | 1,800.332 | 444,871.7 |
| Water | 1.758 | 4.553 | 1,125.1 |
| Total | 696.87 | 1,804.885 | 445,996.8 |
How Hardeman County compares
By original Census land area, Hardeman County ranks #217 of 254 in Texas and #1342 of 3,222 nationally. National rankings include the 50 states, District of Columbia, and Puerto Rico.
Its land area is 0.765 times the Texas county-equivalent median of 908.7 square miles. It accounts for 0.3% of the combined county land area in the state.
See the complete Texas ranking · What counts as a county equivalent?
Population and density of Hardeman County
The Census Bureau estimates that 3,292 people lived in Hardeman County on July 1, 2025. That ranks #3,012 of 3,222 county equivalents nationally and #214 of 254 in Texas. Since the April 1, 2020 estimates base of 3,548, the population has declined by 256 (−7.2%), compared with +8.8% for Texas as a whole.
With 695.1 square miles of land, that is 4.7 people per square mile (1.8 per km²), placing Hardeman County #2,863 nationally for density and #200 in Texas. The median county equivalent has 47 people per square mile; the Texas median is 22. Put another way, there are about 135 acres of land per resident.
| July 1 | 2020 | 2021 | 2022 | 2023 | 2024 | 2025 |
|---|---|---|---|---|---|---|
| Estimate | 3,558 | 3,546 | 3,505 | 3,448 | 3,362 | 3,292 |
| Change | — | −12 | −41 | −57 | −86 | −70 |
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 Hardeman County
2 incorporated places lie at least partly in Hardeman County. Together they are home to 2,610 people (79.3%); the other 682 (20.7%) live outside any incorporated place, in unincorporated communities and rural areas.
The largest is Quanah city, with 2,097 residents in the county.
| Incorporated place | Population 2025 | Since 2020 | Land mi² |
|---|---|---|---|
| Quanah cityCounty seat | 2,097 | −7.9% | 3.476 |
| Chillicothe city | 513 | −7.6% | 1.021 |
Population: U.S. Census Bureau Vintage 2025 subcounty estimates, counting only the part of each place inside Hardeman County. Land: 2026 Census Gazetteer, for the whole place even where it extends into other counties. How communities are listed.
Metropolitan area
Hardeman 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
2 ZIP Code Tabulation Areas have land in Hardeman County, and each lies mostly inside the county.
7922579252
ZIP Code Tabulation Areas are the Census Bureau’s approximations of USPS ZIP Code service areas, from the 2020 Census relationship files. Post-office-box and single-address ZIP Codes have no tabulation area.
Counties bordering Hardeman County
Hardeman County shares a land border with 6 county equivalents, including 2 in Oklahoma. It has more land than 1 of them. The largest neighbor is Wilbarger County (970.9 mi²) and the smallest is Harmon County (537.3 mi²). Together with its neighbors, Hardeman County forms a block of 5,307.4 mi² of land, of which it holds 13.1%.
| Bordering county equivalent | Land mi² | Size vs. Hardeman | Compare |
|---|---|---|---|
| Wilbarger County | 970.9 | 1.4× larger | Compare |
| Cottle County | 900.6 | 1.3× larger | Compare |
| Jackson CountyOklahoma | 802.7 | 1.2× larger | Compare |
| Foard County | 704.4 | about the same | Compare |
| Childress County | 696.5 | about the same | Compare |
| Harmon CountyOklahoma | 537.3 | 1.3× smaller | Compare |
How big is Hardeman County compared with U.S. states?
Hardeman County has less land than any of the 50 states. Rhode Island, the smallest state by land area, has 1,033.9 mi², about 1.5 times as much. Texas’s county land could hold about 376 areas the size of Hardeman County.
Another way to picture it: the same land area would fill a square about 26.4 miles (42.4 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 Hardeman County?
Hardeman County has more land than 1,880 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 Hardeman County at #1,446 nationally by total area, 104 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 Hardeman County in the national ranking. They can be in different states and are not necessarily geographic neighbors.
| Land rank | County equivalent | Land mi² | Comparison |
|---|---|---|---|
| #1341 | Morris County, Kansas | 695.3 | Compare |
| #1342 | Hardeman County, Texas | 695.1 | This county |
| #1343 | Clinton County, Iowa | 695 | 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 34.289904, -99.745697. 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: 1,800,332,385 m²; AWATER: 4,553,866 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 Hardeman County?
Hardeman County, Texas has 695.1 square miles (1,800.3 km²) of land and 1.758 square miles of water, for a total area of 696.9 square miles. It ranks #1342 of 3,222 U.S. county equivalents by land area.
Is Hardeman County the largest county in Texas?
No. Hardeman County ranks #217 of 254 in Texas by land area. The largest is Brewster County, with 6,183.8 square miles of land.
What counties border Hardeman County?
Hardeman County shares a land border with Foard County, Jackson County, Oklahoma, Wilbarger County, Childress County, Harmon County, Oklahoma, and Cottle County.
What is the population of Hardeman County?
The Census Bureau estimates Hardeman County had 3,292 residents on July 1, 2025, ranking #3,012 of 3,222 county equivalents. That is 4.7 people per square mile of land.
What is the county seat of Hardeman County?
The county seat of Hardeman County is Quanah.
What cities and towns are in Hardeman County?
Hardeman County has 2 incorporated places. The most populous are Quanah city and Chillicothe city; 682 residents live outside any incorporated place.
Is Hardeman County part of a metropolitan area?
No. Hardeman County is outside every metropolitan and micropolitan statistical area in the July 2023 OMB delineation.
How many ZIP codes are in Hardeman County?
2 ZIP Code Tabulation Areas have land in Hardeman 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 Hardeman County compare with U.S. states?
It has less land than every state. Rhode Island, the smallest, has 1.5 times as much land.
How many acres of land are in Hardeman County?
The land measurement converts to approximately 444,872 acres. Including water, total area is approximately 445,997 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.