Caldwell County, TX ZIP Codes
11 ZIP codes cover all or part of Caldwell County, Texas. The Census Bureau counts 48,669 residents in the county, with a median household income of $69,758 and a median home value of $240,500. Median household income ranges from $55,952 in 78655 to $94,005 in 78662. Its largest communities include San Marcos, Lockhart, Luling, Mustang Ridge and Martindale.
Caldwell County (Census county figures)
| Measure | Census figure |
|---|---|
| Residents | 48,669 |
| Households | 16,647 |
| Median household income | $69,758 |
| Median home value | $240,500 |
| Median age | 38.4 |
| Median rent | $1,173 |
All 11 ZIP codes together
| Measure | Value |
|---|---|
| Residents (sum of ZIP codes) | 131,517 |
| Households (sum of ZIP codes) | 46,799 |
| Median household income, range across ZIP codes | $55,952 (78655) to $94,005 (78662) |
| Household-weighted average of ZIP medians (an approximation, not a true median) | $82,000 |
| Homeowners | 72.8% |
| Households with kids under 18 | 36.4% |
| Moved in the past year | 12.1% |
| Carrier routes in EDDM2GO's route library | 69 routes, 58,545 homes (9 of 11 ZIP codes) |
Top facts
- Highest median household income in Caldwell County: 78662 ($94,005)
- Most residents: 78640 (77,531 people)
- Highest homeownership: 78632 (89.9% own their home)
- Most households with kids: 78616 (44.7% of households)
- Most new movers: 78640 (14.0% moved in last year)
- Youngest median age: 78616 (30.6 years)
- Highest median home value: 78640 ($330,400)
Every ZIP code in Caldwell County
| ZIP | Mailing city | Residents | Households | Median income | Home value | Homeowners | With kids | New movers | Carrier routes | Mailboxes | Why listed |
|---|---|---|---|---|---|---|---|---|---|---|---|
| 78640 | Kyle | 77,531 | 27,375 | $90,075 | $330,400 | 71.0% | 39.8% | 14.0% | 34 | 35,535 | 15% of its land |
| 78644 | Lockhart | 22,348 | 7,747 | $74,709 | $279,800 | 74.9% | 29.8% | 12.9% | 13 | 10,077 | 100% of its land |
| 78616 | Dale | 10,683 | 3,188 | $64,715 | $211,500 | 79.5% | 44.7% | 4.3% | 6 | 5,151 | 82% of its land |
| 78648 | Luling | 7,863 | 3,274 | $57,621 | $217,500 | 69.6% | 24.8% | 12.7% | 7 | 3,529 | 76% of its land |
| 78655 | Martindale | 3,730 | 1,388 | $55,952 | $269,900 | 65.3% | 39.0% | 8.2% | 2 | 939 | 60% of its land |
| 78662 | Red Rock | 3,015 | 1,381 | $94,005 | $248,600 | 84.5% | 28.3% | 4.0% | 2 | 1,080 | 19% of its land |
| 78656 | Maxwell | 2,847 | 976 | $81,346 | $238,100 | 69.2% | 28.3% | 5.0% | 3 | 3,100 | 97% of its land |
| 78632 | Harwood | 1,245 | 526 | $62,500 | $187,400 | 89.9% | 35.7% | 3.2% | 1 | 480 | 41% of its land |
| 78953 | Rosanky | 1,089 | 575 | $83,438 | $325,400 | 83.0% | 8.5% | 2.7% | 1 | 511 | 35% of its land |
| 78661 | Prairie Lea | 835 | 233 | $82,896 | $209,700 | 91.4% | 48.9% | 3.1% | — | — | 100% of its land |
| 78622 | Fentress | 331 | 136 | — | $160,900 | 89.7% | 28.7% | 14.8% | — | — | 100% of its land |
A ZIP code is listed for Caldwell County when at least 10% of its land is in the county, when it holds at least 10% of the county's land, or when the county is its main county. Totals add up whole ZIP codes, including parts that cross the county line; the Census county figures above do not.
Cities and communities
- San Marcos — 70,897 residents · 2 ZIP codes
- Lockhart — 15,326 residents · 1 ZIP code
- Luling — 5,531 residents · 1 ZIP code
- Mustang Ridge — 1,750 residents · 3 ZIP codes
- Martindale — 1,072 residents · 1 ZIP code
- Staples — 288 residents · 3 ZIP codes
Metro maps
- Austin ZIP code map — 89 ZIP codes
Rankings
- Richest ZIP codes in Caldwell County — 9 ZIP codes ranked
- ZIP codes with the highest home values in Caldwell County — 9 ZIP codes ranked
- ZIP codes with the highest homeownership in Caldwell County — 9 ZIP codes ranked
- ZIP codes with the most families with kids in Caldwell County — 9 ZIP codes ranked
- ZIP codes with the most new movers in Caldwell County — 9 ZIP codes ranked
- Youngest ZIP codes in Caldwell County — 9 ZIP codes ranked
- Oldest ZIP codes in Caldwell County — 9 ZIP codes ranked
- Fastest-growing ZIP codes in Caldwell County — 8 ZIP codes ranked
Price a mailing to Caldwell County ZIP codes
EDDM guides
Pick carrier routes on the EDDM route map
Frequently asked questions
- What ZIP codes are in Caldwell County, TX?
- 78640, 78644, 78616, 78648, 78655, 78662, 78656, 78632, 78953, 78661 and 78622. Some cross the county line; the table shows each ZIP's share of land in the county.
- What is the population of Caldwell County?
- 48,669 residents in 16,647 households (ACS 5-year estimates, 2020–2024).
- What is the median household income in Caldwell County?
- $69,758 for the county as a whole. Its ZIP codes range from $55,952 (78655) to $94,005 (78662).
- Which Caldwell County ZIP code has the highest median household income?
- 78662, at $94,005, among ZIP codes with at least 1,000 residents. See the full ranking of Caldwell County ZIP codes by income.
- How many carrier routes and mailboxes are in Caldwell County?
- For the 9 of 11 ZIP codes in EDDM2GO's stored route library: 69 carrier routes reaching 58,545 residential and 1,856 business mailboxes. The route map loads the rest when you search them.
This product uses the Census Bureau Data API but is not endorsed or certified by the Census Bureau.