Guadalupe County area

Population and density of Guadalupe County

The Census Bureau estimates that 201,111 people lived in Guadalupe County on July 1, 2025. That ranks #358 of 3,222 county equivalents nationally and #29 of 254 in Texas. Since the April 1, 2020 estimates base of 172,729, the population has grown by 28,382 (+16.4%), compared with +8.8% for Texas as a whole.

With 711.2 square miles of land, that is 283 people per square mile (109 per km²), placing Guadalupe County #532 nationally for density and #26 in Texas. The median county equivalent has 47 people per square mile; the Texas median is 22. Put another way, there are about 2.3 acres of land per resident.

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 Guadalupe County

13 incorporated places lie at least partly in Guadalupe County. Together they are home to 151,816 people (75.5%); the other 49,295 (24.5%) live outside any incorporated place, in unincorporated communities and rural areas.

The largest is Seguin city, with 41,048 residents in the county. By land, New Braunfels city is the largest at 45.2 mi² across all its counties. Among places with at least 1,000 residents in 2020, Seguin city grew fastest since then (+39.3%).

Population: U.S. Census Bureau Vintage 2025 subcounty estimates, counting only the part of each place inside Guadalupe County. Land: 2026 Census Gazetteer, for the whole place even where it extends into other counties. How communities are listed.

Metropolitan area

Guadalupe County is a central county of the San Antonio-New Braunfels, TX Metropolitan Statistical Area. Its 8 county equivalents have 2,813,140 residents on 7,313.3 square miles of land; Guadalupe County accounts for 9.7% of the land and 7.1% of the residents. By combined land it ranks #24 of 393 metropolitan areas, and #24 by population. It belongs to the San Antonio-New Braunfels-Kerrville, TX Combined Statistical Area.

ZIP codes

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

7810878121781237812478130781327814078154781557863878648786557866678670

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 Guadalupe County

Guadalupe County shares a land border with 6 county equivalents. It has more land than 3 of them. The largest neighbor is Bexar County (1,240.5 mi²) and the smallest is Caldwell County (544.5 mi²). Together with its neighbors, Guadalupe County forms a block of 5,603.1 mi² of land, of which it holds 12.7%.

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

Guadalupe County has less land than any of the 50 states. Rhode Island, the smallest state by land area, has 1,033.9 mi², about 1.5 times as much. Texas’s county land could hold about 367 areas the size of Guadalupe County.

Another way to picture it: the same land area would fill a square about 26.7 miles (42.9 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 Guadalupe County?

Guadalupe County has more land than 1,933 of the other 3,221 county equivalents in the dataset.

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 Guadalupe County at #1,400 nationally by total area, 111 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 0.5%, compared with a national county-equivalent median of 1.2% — 0.7 percentage points lower. 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 Guadalupe County in the national ranking. They can be in different states and are not necessarily geographic neighbors.

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.