County · GEOID 48055
Caldwell County, TX ZIP codes
14 ZIP/ZCTAs intersecting this county.
U.S. Census Bureau, ACS 2019–2023 5-year (vintage 2023). Geography: County Caldwell County (GEOID 48055). Methodology
Combined population of ZIP/ZCTAs intersecting this county: 259,097 (14 ZIPs).
Combined population of ZIP/ZCTAs intersecting this county. Each intersecting ZIP contributes its full ZCTA population; overlap percents are descriptive only. This is not the Census county ACS headline above. Methodology
Caldwell County, TX ZIP code map

ZIP/ZCTA overlap with Caldwell County
Population overlap
Share of each ZIP/ZCTA’s population located within Caldwell County, based on ZIP Code Database county-overlap data. This is a population measure, not land-area overlap or the Census county population.
- 786100.7%
- 7861671.7%
Directory county
- 78622100.0%
Directory county
- 7863242.4%
- 786402.1%
- 78644100.0%
Directory county
- 7864892.5%
Directory county
- 7865573.6%
Directory county
- 7865696.3%
Directory county
- 78661100.0%
Directory county
- 7866212.6%
- 786661.4%
- 7895318.1%
- 789591.9%
ZIP Code Database county-overlap table, field percent_of_zip_population_in_county, keyed by county_geoid. Not ACS 2019–2023. Overlap vintage is the shipped overlap table and is separate from ACS. Methodology
ZIP codes intersecting Caldwell County
| ZIP | City | County | Population | Income |
|---|---|---|---|---|
| 78610 | Buda | Hays County | 46,685 | $110,417 |
| 78616 | Dale | Caldwell County | 10,008 | $70,148 |
| 78622 | Fentress | Caldwell County | 353 | $72,941 |
| 78632 | Harwood | Gonzales County | 1,391 | $63,250 |
| 78640 | Kyle | Hays County | 71,460 | $88,533 |
| 78644 | Lockhart | Caldwell County | 20,599 | $72,155 |
| 78648 | Luling | Caldwell County | 8,022 | $56,533 |
| 78655 | Martindale | Caldwell County | 3,687 | $48,409 |
| 78656 | Maxwell | Caldwell County | 2,953 | $78,058 |
| 78661 | Prairie Lea | Caldwell County | 658 | $47,917 |
| 78662 | Red Rock | Bastrop County | 3,147 | $95,238 |
| 78666 | San Marcos | Hays County | 87,775 | $55,478 |
| 78953 | Rosanky | Bastrop County | 958 | $88,852 |
| 78959 | Waelder | Gonzales County | 1,401 | $51,029 |