County Maps US

Dallam County, Texas

A county in Texas, ranked 180 of 254 by population.

CountyFIPS 48111

Within Texas
Dallam County, highlighted, with the areas around it. Boundaries generalised from the 2025 Census cartographic boundary file; neighbour fills carry no data. The dot marks Dalhart, the county seat, located via the 2025 Census Gazetteer.

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Population
7,508
+371 (+5.2%) since 2020
Land area
1,503
square miles. A further 0.1% of the total area is water
Population density
5.0
people per square mile, computed rather than published
County seat
Dalhart
Seat of county government.
Established
1876
149 years ago
Largest city
Dalhart city
Population 5,770 for the whole place, which extends beyond this county.

Sources: US Census Bureau, Population Estimates Program, Vintage 2025 Population Estimates, released 26 March 2026; US Census Bureau, Gazetteer Files, 2025 Gazetteer Files, released 10 September 2025; Wikidata (CC0), Wikidata. Retrieved 30 August 2026.

Satellite view

Aerial imagery of Dallam County with its boundary drawn on top. A map shows you the shape; this shows you what is inside it, and which side of the line a place falls on.

Aerial view of Dallam County, Texas from the USGS National Map, with its boundary outlined
Imagery: USGS National Map, USGS Imagery Only, public domain, requested from USGS by your browser when you reach this point on the page, at 800 by 535 pixels. The boundary is the 2025 Census cartographic boundary file, reprojected to Web Mercator to match the imagery. You can also open the USGS National Map viewer.

Where Dallam County ranks

Position among the 254 counties of Texas, and among all 3,144 US counties and county-equivalents. Computed from the figures on this page.

MeasureValueIn TexasNationally
Population7,508180th of 2542,616th of 3,144
Land area1,503 sq mi18th of 254397th of 3,144
Population density5.0 per sq mi198th of 2542,776th of 3,144
Median household income$71,50075th of 2541,086th of 3,143

Full data for Dallam County

Every figure below is attributed to the Census Bureau product it came from, with the vintage of that product.
MeasureValueSource and vintage
Population7,508Vintage 2025 Population Estimates
Population in 20207,137Vintage 2025 Population Estimates
2020 estimates base?7,135Vintage 2025 Population Estimates
Land area1,503 sq mi2025 Gazetteer Files
Water area1.8 sq mi2025 Gazetteer Files
Total area1,505 sq mi2025 Gazetteer Files
Population density?5.0 per sq miComputed: Vintage 2025 estimates divided by 2025 Gazetteer land area
Median household income$71,500American Community Survey 2020-2024 5-Year Estimates
Median home value$151,400American Community Survey 2020-2024 5-Year Estimates
Median age29.9American Community Survey 2020-2024 5-Year Estimates
Households2,586American Community Survey 2020-2024 5-Year Estimates
Housing units3,052American Community Survey 2020-2024 5-Year Estimates

Sources: US Census Bureau, Population Estimates Program, Vintage 2025 Population Estimates, released 26 March 2026; US Census Bureau, Gazetteer Files, 2025 Gazetteer Files, released 10 September 2025; US Census Bureau, American Community Survey, American Community Survey 2020-2024 5-Year Estimates, released 29 January 2026. Population density is computed here, not published: it divides the Vintage 2025 population estimate by the 2025 Gazetteer land area, which are two different Census products. Retrieved 30 August 2026.

How the population changed

The Census Bureau publishes the components behind an estimate, not just the total. For the year to July 2025:

Births minus deaths
+140
188 births, 48 deaths
Net migration
-76
More people moved out than moved in.

Source: US Census Bureau, Population Estimates Program, Vintage 2025 Population Estimates, released 26 March 2026. Retrieved 30 August 2026.

The 5 areas bordering Dallam County

Ordered by the length of the border actually shared, which the Census Bureau publishes in its county adjacency file and which no other county reference presents.

Bordering areaStateShared borderPopulation
Hartley CountyTexas49 mi4,904
Cimarron CountyOklahoma47 mi2,059
Union CountyNew Mexico33 mi3,844
Sherman CountyTexas31 mi2,781
Moore CountyTexasa single point21,891

Source: US Census Bureau, County Adjacency File, 2025 County Adjacency File, released 15 September 2025. Retrieved 30 August 2026.

All 254 counties of Texas

Open the interactive Texas county map, or jump straight to any of them.

Data on this page last rebuilt 30 August 2026. How these figures are produced.