Presidio County area

Presidio County, Texas covers 3,855.9 square miles: 3,855.3 square miles of land and 0.685 square miles of water. Its county seat is Marfa. An estimated 5,433 people lived there in 2025.

Official Census measurements · GEOID 483772026 Gazetteer · retrieved September 27, 2026
Land area3,855.3 mi²
Water area0.685 mi²
Population (2025)5,433
People per mi²1.4

County outline

Generalized outline of Presidio County, Texas
2025 Census cartographic boundary, fitted to this frame. County maps are not at a common scale. The 2026 area measurements below come from the separate Gazetteer release. Map source and limitations.

Where Presidio County is located

Presidio County highlighted on a map of all U.S. county equivalents. About the maps

Area breakdown

Land accounts for 100% of Presidio County’s measured area and water for 0%. Its combined area converts to 9,986.8 square kilometers or approximately 2,467,800 acres.

Green: land · blue: water

MeasurementSquare milesSquare kilometersAcres
Land3,855.2529,985.0572,467,361.3
Water0.6851.774438.4
Total3,855.9379,986.8312,467,799.7

How Presidio County compares

By original Census land area, Presidio County ranks #4 of 254 in Texas and #128 of 3,222 nationally. National rankings include the 50 states, District of Columbia, and Puerto Rico.

Its land area is 4.243 times the Texas county-equivalent median of 908.7 square miles. It accounts for 1.5% of the combined county land area in the state.

See the complete Texas ranking · What counts as a county equivalent?

Population and density of Presidio County

The Census Bureau estimates that 5,433 people lived in Presidio County on July 1, 2025. That ranks #2,859 of 3,222 county equivalents nationally and #196 of 254 in Texas. Since the April 1, 2020 estimates base of 6,130, the population has declined by 697 (−11.4%), compared with +8.8% for Texas as a whole.

With 3,855.3 square miles of land, that is 1.4 people per square mile (0.54 per km²), placing Presidio County #3,113 nationally for density and #235 in Texas. The median county equivalent has 47 people per square mile; the Texas median is 22. Put another way, there are about 454 acres of land per resident.

Estimated population, 2020–2025 · line scaled to this county’s own range
July 1202020212022202320242025
Estimate6,1056,1075,9345,7305,6265,433
Change—+2−173−204−104−193

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 Presidio County

2 incorporated places lie at least partly in Presidio County. Together they are home to 4,483 people (82.5%); the other 950 (17.5%) live outside any incorporated place, in unincorporated communities and rural areas.

The largest is Presidio city, with 2,909 residents in the county. The county seat, Marfa city, has 1,574 residents.

Incorporated placePopulation 2025Since 2020Land mi²
Presidio city2,909−10.9%2.575
Marfa cityCounty seat1,574−12%1.623

Population: U.S. Census Bureau Vintage 2025 subcounty estimates, counting only the part of each place inside Presidio County. Land: 2026 Census Gazetteer, for the whole place even where it extends into other counties. How communities are listed.

Metropolitan area

Presidio 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

4 ZIP Code Tabulation Areas have land in Presidio County; 3 of them have most of their land inside the county, and the others mainly cover neighboring areas.

79843798457984679854

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 Presidio County

Presidio County shares a land border with 2 county equivalents. It has more land than 1 of them. The largest neighbor is Brewster County (6,183.8 mi²) and the smallest is Jeff Davis County (2,264.6 mi²). Together with its neighbors, Presidio County forms a block of 12,303.6 mi² of land, of which it holds 31.3%.

Map of Presidio County and the 2 county equivalents that border it Brewster County, Texas: 6,183.8 mi² landJeff Davis County, Texas: 2,264.6 mi² land
Presidio County (dark) and its bordering county equivalents. Select a neighbor to open its profile. Drawn from the 2025 Census cartographic boundaries in an equal-area projection. How borders are determined.
Bordering county equivalentLand mi²Size vs. PresidioCompare
Brewster County6,183.81.6× largerCompare
Jeff Davis County2,264.61.7× smallerCompare

How big is Presidio County compared with U.S. states?

Presidio County has more land than 2 of the 50 states. It is about 2 times the land area of Delaware (1,948.6 mi²), while Connecticut, the next larger state, has 1.3 times as much land (4,842.5 mi²). Texas’s county land could hold about 68 areas the size of Presidio County.

Land area: Presidio County and the closest-sized states
Delaware1,948.6 mi²
Presidio County3,855.3 mi²
Connecticut4,842.5 mi²

Another way to picture it: the same land area would fill a square about 62.1 miles (99.9 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 Presidio County?

Presidio County has more land than 3,094 of the other 3,221 county equivalents in the dataset.

Land area compared with the typical county equivalent
Presidio County3,855.3 mi²
Texas median908.7 mi²
National median604.5 mi²

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 Presidio County at #134 nationally by total area, 6 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%, compared with a national county-equivalent median of 1.2% — 1.2 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 Presidio County in the national ranking. They can be in different states and are not necessarily geographic neighbors.

Land rankCounty equivalentLand mi²Comparison
#127Somerset County, Maine3,924.3Compare
#128Presidio County, Texas3,855.3This county
#129Union County, New Mexico3,825.1Compare

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 30.005891, -104.261619. 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: 9,985,057,450 m²; AWATER: 1,773,188 m². Rankings use ALAND; exact ties use ascending GEOID. Tables preserve Census-published square miles to three decimals, with conversions based on those values.

Download the official county source ZIP ↗ · Methodology

Common questions

How big is Presidio County?

Presidio County, Texas has 3,855.3 square miles (9,985.1 km²) of land and 0.685 square miles of water, for a total area of 3,855.9 square miles. It ranks #128 of 3,222 U.S. county equivalents by land area.

Is Presidio County the largest county in Texas?

No. Presidio County ranks #4 of 254 in Texas by land area. The largest is Brewster County, with 6,183.8 square miles of land.

What counties border Presidio County?

Presidio County shares a land border with Brewster County and Jeff Davis County.

What is the population of Presidio County?

The Census Bureau estimates Presidio County had 5,433 residents on July 1, 2025, ranking #2,859 of 3,222 county equivalents. That is 1.4 people per square mile of land.

What is the county seat of Presidio County?

The county seat of Presidio County is Marfa.

What cities and towns are in Presidio County?

Presidio County has 2 incorporated places. The most populous are Presidio city and Marfa city; 950 residents live outside any incorporated place.

Is Presidio County part of a metropolitan area?

No. Presidio County is outside every metropolitan and micropolitan statistical area in the July 2023 OMB delineation.

How many ZIP codes are in Presidio County?

4 ZIP Code Tabulation Areas have land in Presidio 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 Presidio 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 Presidio County?

The land measurement converts to approximately 2,467,361 acres. Including water, total area is approximately 2,467,800 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.

Cite this county

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