County Maps US

Duval County, Texas

A county in Texas, ranked 169 of 254 by population.

CountyFIPS 48131

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

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Population
9,402
-409 (-4.2%) since 2020
Land area
1,793
square miles. A further 0.1% of the total area is water
Population density
5.2
people per square mile, computed rather than published
County seat
San Diego
Seat of county government.
Established
1876
149 years ago
Largest city
San Diego city
Population 2,760 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 Duval 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 Duval 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 540 by 800 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 Duval 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
Population9,402169th of 2542,455th of 3,144
Land area1,793 sq mi13th of 254332nd of 3,144
Population density5.2 per sq mi194th of 2542,759th of 3,144
Median household income$49,038230th of 2542,827th of 3,143

Full data for Duval County

Every figure below is attributed to the Census Bureau product it came from, with the vintage of that product.
MeasureValueSource and vintage
Population9,402Vintage 2025 Population Estimates
Population in 20209,811Vintage 2025 Population Estimates
2020 estimates base?9,830Vintage 2025 Population Estimates
Land area1,793 sq mi2025 Gazetteer Files
Water area2.1 sq mi2025 Gazetteer Files
Total area1,796 sq mi2025 Gazetteer Files
Population density?5.2 per sq miComputed: Vintage 2025 estimates divided by 2025 Gazetteer land area
Median household income$49,038American Community Survey 2020-2024 5-Year Estimates
Median home value$89,400American Community Survey 2020-2024 5-Year Estimates
Median age33.6American Community Survey 2020-2024 5-Year Estimates
Households3,053American Community Survey 2020-2024 5-Year Estimates
Housing units4,420American 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
-43
106 births, 149 deaths
Net migration
-203
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 7 areas bordering Duval 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
Jim Wells CountyTexas55 mi38,804
Webb CountyTexas48 mi281,224
McMullen CountyTexas29 mi544
Jim Hogg CountyTexas26 mi4,555
Brooks CountyTexas18 mi6,579
Live Oak CountyTexas6.0 mi11,929
La Salle CountyTexasa single point6,517

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.