Caldwell County, Texas
County seat: Lockhart · Population 55,150 (2025) · 545 sq mi
Caldwell County is the 67th most populous of Texas's 254 counties, with 55,150 people (2025 estimate). Its county seat is Lockhart. It is part of the Capital region, one of the 12 Texas Comptroller economic regions. The map shows its 7 cities and towns and the 6 neighboring counties.
Caldwell County facts
- County seat
- Lockhart
- Population (2025 estimate)
- 55,150 +20.2% since 2020
- Land area
- 545 sq mi 235th largest of 254
- Water area
- 2 sq mi
- Population density
- 101 per sq mi
- Established
- 1848
- Named after
- Mathew Caldwell Texan settler
- Largest city
- Lockhart 18,159
- Median household income
- $69,758
- Cities and towns
- 7
- ZIP codes
- 14
- Time zone
- Central
- FIPS code
- 48055
Cities and towns in Caldwell County
Caldwell County has 7 incorporated cities, towns and villages. Populations count the people living inside Caldwell County; cities that cross a county line also list the other counties.
| Name | Type | Population 2025 | Also in |
|---|---|---|---|
| Lockhart (county seat) | City | 18,159 | |
| Luling | City | 5,788 | Guadalupe County |
| Martindale | City | 1,298 | |
| Uhland | City | 685 | Hays County |
| Mustang Ridge | City | 537 | Bastrop and Travis counties |
| Niederwald | City | 256 | Hays County |
| San Marcos | City | 0 | Guadalupe and Hays counties |
ZIP codes in Caldwell County
14 ZIP codes reach into Caldwell County. ZIP codes ignore county lines, so some also cover a neighboring county.
- 78610 also Hays and Travis counties
- 78616 also Bastrop and Travis counties
- 78622
- 78632 also Gonzales County
- 78640 also Hays and Travis counties
- 78644
- 78648 also Guadalupe and Gonzales counties
- 78655 also Guadalupe County
- 78656 also Hays County
- 78661
- 78662 also Bastrop County
- 78666 also Hays, Guadalupe and Comal counties
- 78953 also Bastrop County
- 78959 also Gonzales, Fayette and Bastrop counties
Population of Caldwell County, 2020–2025
Caldwell County grew by 9,268 people (+20.2%) between April 2020 and July 2025: 1,159 more births than deaths and a net gain of 8,100 people from migration.
| Year (July 1) | Population |
|---|---|
| 2020 | 45,945 |
| 2021 | 46,970 |
| 2022 | 47,995 |
| 2023 | 50,289 |
| 2024 | 52,939 |
| 2025 | 55,150 |
Neighboring counties
- Guadalupe County southwest · 201,111 people
- Bastrop County northeast · 118,908 people
- Gonzales County south · 20,159 people
- Hays County northwest · 304,390 people
- Travis County north · 1,389,670 people
- Fayette County east · 25,459 people
Printable Caldwell County map
The PDF is a vector file with real text: it prints sharp on Letter paper and you can search it for a town. The PNG is 2400 pixels wide for slides and documents. Both are free to use with a credit to WhichCounty.
- PDF (Letter) (141 KB)
- PNG (2400 px) (76 KB)
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Sources
- Boundaries: U.S. Census Bureau, 2025 Cartographic Boundary Files (1:500,000).
- Population: Census Bureau county and city estimates, Vintage 2025. CDP populations: American Community Survey 2020–2024.
- Places and ZIP codes: Census Bureau 2026 Gazetteer and 2020 ZIP Code Tabulation Area relationship files.
- County seat, founding year and name origin: Wikidata (CC0), checked against state sources.
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