County Maps US

San Jacinto County, Texas

A county in Texas, ranked 97 of 254 by population.

CountyFIPS 48407

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

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Population
29,488
+1,946 (+7.1%) since 2020
Land area
569.2
square miles. A further 9.3% of the total area is water
Population density
51.8
people per square mile, computed rather than published
County seat
Coldspring
Seat of county government.
Established
1870
155 years ago
Largest city
Shepherd city
Population 1,942.

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 San Jacinto 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 San Jacinto 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 640 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 San Jacinto 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
Population29,48897th of 2541,461st of 3,144
Land area569.2 sq mi233rd of 2541,789th of 3,144
Population density51.8 per sq mi78th of 2541,435th of 3,144
Median household income$65,364125th of 2541,608th of 3,143

Full data for San Jacinto County

Every figure below is attributed to the Census Bureau product it came from, with the vintage of that product.
MeasureValueSource and vintage
Population29,488Vintage 2025 Population Estimates
Population in 202027,542Vintage 2025 Population Estimates
2020 estimates base?27,406Vintage 2025 Population Estimates
Land area569.2 sq mi2025 Gazetteer Files
Water area58.7 sq mi2025 Gazetteer Files
Total area627.9 sq mi2025 Gazetteer Files
Population density?51.8 per sq miComputed: Vintage 2025 estimates divided by 2025 Gazetteer land area
Median household income$65,364American Community Survey 2020-2024 5-Year Estimates
Median home value$209,300American Community Survey 2020-2024 5-Year Estimates
Median age44.0American Community Survey 2020-2024 5-Year Estimates
Households10,881American Community Survey 2020-2024 5-Year Estimates
Housing units15,011American 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
-59
349 births, 408 deaths
Net migration
+220
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 5 areas bordering San Jacinto 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
Polk CountyTexas54 mi53,434
Montgomery CountyTexas25 mi781,194
Walker CountyTexas25 mi83,842
Liberty CountyTexas22 mi121,364
Trinity CountyTexas15 mi14,384

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.