County Maps US

Karnes County, Texas

A county in Texas, ranked 139 of 254 by population.

CountyFIPS 48255

Within Texas
Karnes County, highlighted, with the areas around it. Boundaries generalised from the 2025 Census cartographic boundary file; neighbour fills carry no data.

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Population
15,018
+207 (+1.4%) since 2020
Land area
747.8
square miles. A further 0.8% of the total area is water
Population density
20.1
people per square mile, computed rather than published
County seat
Karnes City
Seat of county government.
Established
1854
171 years ago
Largest city
Karnes City city
Population 3,540.

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 Karnes 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 Karnes 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 781 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 Karnes 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
Population15,018139th of 2542,096th of 3,144
Land area747.8 sq mi209th of 2541,181st of 3,144
Population density20.1 per sq mi135th of 2542,244th of 3,144
Median household income$60,214163rd of 2542,059th of 3,143

Full data for Karnes County

Every figure below is attributed to the Census Bureau product it came from, with the vintage of that product.
MeasureValueSource and vintage
Population15,018Vintage 2025 Population Estimates
Population in 202014,811Vintage 2025 Population Estimates
2020 estimates base?14,773Vintage 2025 Population Estimates
Land area747.8 sq mi2025 Gazetteer Files
Water area5.8 sq mi2025 Gazetteer Files
Total area753.6 sq mi2025 Gazetteer Files
Population density?20.1 per sq miComputed: Vintage 2025 estimates divided by 2025 Gazetteer land area
Median household income$60,214American Community Survey 2020-2024 5-Year Estimates
Median home value$149,000American Community Survey 2020-2024 5-Year Estimates
Median age38.1American Community Survey 2020-2024 5-Year Estimates
Households4,730American Community Survey 2020-2024 5-Year Estimates
Housing units5,975American 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
-13
144 births, 157 deaths
Net migration
+10
More people moved in than moved out.

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

The 7 areas bordering Karnes 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
Wilson CountyTexas36 mi56,139
DeWitt CountyTexas28 mi20,309
Bee CountyTexas18 mi32,515
Goliad CountyTexas16 mi7,208
Gonzales CountyTexas10 mi20,159
Live Oak CountyTexas8.7 mi11,929
Atascosa CountyTexas8.7 mi53,590

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.