Somervell County area

Somervell County, Texas covers 191.7 square miles: 186.2 square miles of land and 5.485 square miles of water. Its county seat is Glen Rose. An estimated 10,261 people lived there in 2025.

Official Census measurements · GEOID 484252026 Gazetteer · retrieved September 27, 2026
Land area186.2 mi²
Water area5.485 mi²
Population (2025)10,261
People per mi²55

County outline

Generalized outline of Somervell 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 Somervell County is located

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

Area breakdown

Land accounts for 97.1% of Somervell County’s measured area and water for 2.9%. Its combined area converts to 496.5 square kilometers or approximately 122,683 acres.

Green: land · blue: water

MeasurementSquare milesSquare kilometersAcres
Land186.207482.274119,172.5
Water5.48514.2063,510.4
Total191.692496.48122,682.9

How Somervell County compares

By original Census land area, Somervell County ranks #253 of 254 in Texas and #3019 of 3,222 nationally. National rankings include the 50 states, District of Columbia, and Puerto Rico.

Its land area is 0.205 times the Texas county-equivalent median of 908.7 square miles. It accounts for 0.1% of the combined county land area in the state.

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

Population and density of Somervell County

The Census Bureau estimates that 10,261 people lived in Somervell County on July 1, 2025. That ranks #2,460 of 3,222 county equivalents nationally and #162 of 254 in Texas. Since the April 1, 2020 estimates base of 9,205, the population has grown by 1,056 (+11.5%), compared with +8.8% for Texas as a whole.

With 186.2 square miles of land, that is 55 people per square mile (21 per km²), placing Somervell County #1,460 nationally for density and #75 in Texas. The median county equivalent has 47 people per square mile; the Texas median is 22. Put another way, there are about 12 acres of land per resident.

Estimated population, 2020–2025 · line scaled to this county’s own range
July 1202020212022202320242025
Estimate9,2069,4779,7939,88710,08610,261
Change—+271+316+94+199+175

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 Somervell County

1 incorporated place lies at least partly in Somervell County. Together they are home to 3,148 people (30.7%); the other 7,113 (69.3%) live outside any incorporated place, in unincorporated communities and rural areas.

The largest is Glen Rose city, with 3,148 residents in the county.

Metropolitan area

Somervell 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

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

76033760437604876070760777643376690

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 Somervell County

Somervell County shares a land border with 4 county equivalents. Each of them has more land than Somervell County. The largest neighbor is Erath County (1,083.2 mi²) and the smallest is Hood County (420.7 mi²). Together with its neighbors, Somervell County forms a block of 3,398.2 mi² of land, of which it holds 5.5%.

Map of Somervell County and the 4 county equivalents that border it Hood County, Texas: 420.7 mi² landBosque County, Texas: 983 mi² landErath County, Texas: 1,083.2 mi² landJohnson County, Texas: 725.1 mi² land
Somervell 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. SomervellCompare
Erath County1,083.25.8× largerCompare
Bosque County9835.3× largerCompare
Johnson County725.13.9× largerCompare
Hood County420.72.3× largerCompare

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

Somervell County has less land than any of the 50 states. Rhode Island, the smallest state by land area, has 1,033.9 mi², about 5.6 times as much. Texas’s county land could hold about 1,403 areas the size of Somervell County.

Land area: Somervell County and the closest-sized states
Somervell County186.2 mi²
Rhode Island1,033.9 mi²

Another way to picture it: the same land area would fill a square about 13.6 miles (22 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 Somervell County?

Somervell County has more land than 203 of the other 3,221 county equivalents in the dataset.

Land area compared with the typical county equivalent
Somervell County186.2 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 Somervell County at #3,038 nationally by total area, 19 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 2.9%, compared with a national county-equivalent median of 1.2% — 1.7 percentage points higher. 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 Somervell County in the national ranking. They can be in different states and are not necessarily geographic neighbors.

Land rankCounty equivalentLand mi²Comparison
#3018Spencer County, Kentucky186.7Compare
#3019Somervell County, Texas186.2This county
#3020Passaic County, New Jersey186.1Compare

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 32.218113, -97.770047. 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: 482,274,685 m²; AWATER: 14,205,924 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 Somervell County?

Somervell County, Texas has 186.2 square miles (482.3 km²) of land and 5.485 square miles of water, for a total area of 191.7 square miles. It ranks #3019 of 3,222 U.S. county equivalents by land area.

Is Somervell County the largest county in Texas?

No. Somervell County ranks #253 of 254 in Texas by land area. The largest is Brewster County, with 6,183.8 square miles of land.

What counties border Somervell County?

Somervell County shares a land border with Hood County, Bosque County, Erath County, and Johnson County.

What is the population of Somervell County?

The Census Bureau estimates Somervell County had 10,261 residents on July 1, 2025, ranking #2,460 of 3,222 county equivalents. That is 55 people per square mile of land.

What is the county seat of Somervell County?

The county seat of Somervell County is Glen Rose.

Is Somervell County part of a metropolitan area?

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

How many ZIP codes are in Somervell County?

7 ZIP Code Tabulation Areas have land in Somervell 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 Somervell County compare with U.S. states?

It has less land than every state. Rhode Island, the smallest, has 5.6 times as much land.

How many acres of land are in Somervell County?

The land measurement converts to approximately 119,172 acres. Including water, total area is approximately 122,683 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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