ZIP codes
7
Caldwell County, TX Demographics & ZIP Codes
Caldwell County, Texas demographics and median household income by ZIP code — 7 ZIP codes — population 46,280 — avg. income $63,737 — avg. home value $202,300. Compare income, housing, and ZIP-level data on US5.
Population
46,280
Median household income (avg.)
$63,737
85% of U.S. median
Average home value
$202,300
58% of U.S. median
Average rent
$970
83% of U.S. median
Caldwell County demographics
Caldwell County, Texas covers 7 ZIP codes, with a combined ZIP-area population of about 46,280.
Median household income in Caldwell County
The average median household income across ZIP codes in Caldwell County, Texas is about $63,737 — about 13% below the TX ZIP average ($73,553), and about 15% below the U.S. median ($75,149).
Among ZIPs with income data, 78656 (San Marcos) is near the top at about $78,058, while 78661 is near the bottom at about $47,917.
Housing in Caldwell County
For housing in Caldwell County, Texas, the average median home value is about $202,300 and the average median rent is about $970.
The most populous ZIP is 78644 (Lockhart) with about 20,599 residents. Use the table below to compare ZIP codes across the county.
ZIP codes in Caldwell County
Sort by population, income, or home value. Click a column header to toggle ascending / descending.
| ZIP | City | County | State | Population ↓ | Income | Home value |
|---|---|---|---|---|---|---|
| 78644 | Lockhart | Caldwell County | TX | 20,599 | $72,155 | $242,900 |
| 78616 | Mustang Ridge | Caldwell County | TX | 10,008 | $70,148 | $174,800 |
| 78648 | Luling | Caldwell County | TX | 8,022 | $56,533 | $217,400 |
| 78655 | Martindale | Caldwell County | TX | 3,687 | $48,409 | $223,000 |
| 78656 | San Marcos | Caldwell County | TX | 2,953 | $78,058 | $194,900 |
| 78661 | — | Caldwell County | TX | 658 | $47,917 | $190,200 |
| 78622 | — | Caldwell County | TX | 353 | $72,941 | $172,900 |
Frequently asked questions
What are the demographics of Caldwell County?
Caldwell County, Texas has a combined ZIP-area population of about 46,280 across 7 ZIP codes. Browse the ZIP table for population, income, and housing by code.
What is the median household income in Caldwell County?
The average median household income across ZIP codes in Caldwell County, Texas is about $63,737, about 13% below the state ZIP average ($73,553), and about 15% below the U.S. median ($75,149). Average median home value is about $202,300. Among ZIPs with data, 78656 (San Marcos) is near the top ($78,058) and 78661 is near the bottom ($47,917).
How many ZIP codes are in Caldwell County?
Caldwell County, Texas includes 7 ZIP codes on US5. Each row links to demographics, median income, and housing for that code.
Where can I find ZIP code demographics for Caldwell County?
This page lists ZIP codes in Caldwell County, Texas with population, median household income, and home value. Select a ZIP for a full demographics profile.