Zip Code 78644
Lockhart, Texas — Caldwell County
📍 ZIP code 78644 is in Lockhart, Caldwell County, Texas.
ZIP code 78644 is located in Lockhart, Caldwell County, Texas. It is a zip code in the Central (CST/CDT) Time Zone with an estimated population of 20,599. The area code for ZIP code 78644 is 512.
Quick Answer
Zip code 78644 is in Lockhart, Texas (Caldwell County). It has a population of 20,599, median household income of $72,155, and median home value of $242,900.
Population
20,599
Income
$72,155
Home Value
$242,900
Climate
97°F / 40°F
About Zip Code 78644
Zip code 78644 is located in Lockhart, Texas, within Caldwell County. Home to approximately 20,599 residents, this area sits at an elevation of 537 ft and falls within the Central (CST/CDT) timezone. The local area code is 512.
The median household income is $72,155 per year, which is above the national median of $70,784. Homes in this zip code have a median value of $242,900, and the cost of living index is 84 (16% below the national average of 100).
Summers average a high of 97°F while winters drop to 40°F. The area receives about 35 in of rain annually. The zip code covers 186.6 square miles of land area and 0.7 square miles of water.
Key Statistics
20,599
$72,155
$242,900
Central (CST/CDT)
512
537 ft
186.6 sq mi
38.6
7,660
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Compare With Nearby Zip Codes
| Metric | 78644 | 78616 | 78656 | 78622 | 78655 | 78670 |
|---|---|---|---|---|---|---|
| City | Lockhart, TX | Dale, TX | Maxwell, TX | Fentress, TX | Martindale, TX | Staples, TX |
| Population | 20,599 | 10,008 | 2,953 | 353 | 3,687 | 178 |
| Median Income | $72,155 | $70,148 | $78,058 | $72,941 | $48,409 | $76,591 |
| Home Value | $242,900 | $174,800 | $194,900 | $172,900 | $223,000 | $233,300 |
| Cost of Living | 84 | 73 | 90 | 60 | 70 | 100 |
| Median Age | 38.6 | 32.2 | 32.6 | 40.3 | 46.6 | 40.4 |
Cost of Living
100 = National Average. Lockhart's cost of living is 16% below the national average.
vs. State Avg
Below
Affordability
Affordable
Income-to-Home
3.4x
Demographics
Zip code 78644 has a population of 20,599 people with a median age of 38.6. There are 7,660 housing units in this area.
Racial & Ethnic Composition
Source: U.S. Census Bureau American Community Survey estimates.
Population History
Lockhart (78644) population trend from 2010 to 2024
↑ 11.1%Source: U.S. Census Bureau estimates and American Community Survey data.
Climate & Weather
97°F
40°F
35 in
0 in
Lockhart experiences hot summers with average highs around 97°F. Winters are mild with lows averaging 40°F. The area receives virtually no snowfall.
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Housing & Economy
Median Home Value
$242,900
Median Household Income
$72,155
With 7,660 housing units across 186.6 square miles, 78644 has a housing density of 41 units per square mile. The home price-to-income ratio is 3.4x.
Location & Geography
Latitude
29.8716°
Longitude
-97.6768°
Land Area
186.6 sq mi
Water Area
0.7 sq mi
Nearby Zip Codes
Zip codes closest to 78644 (Lockhart, TX) with distances:
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ZIP Codes with Similar Income Nationwide
The five U.S. ZIP codes whose median household income is closest to 78644's $72,155. A way to compare Lockhart to economically similar communities elsewhere in the country.
Computed from U.S. Census Bureau ACS 5-Year Estimates by the Zip Code Near Me Data Team.
ZIP Codes with Similar Demographics
The five U.S. ZIP codes whose racial and ethnic composition most closely matches 78644 (Lockhart, TX). Similarity is measured by cosine distance on the five-category ACS demographic vector.
Computed from U.S. Census Bureau ACS 5-Year Estimates by the Zip Code Near Me Data Team.
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People Also Ask
What zip code is Lockhart, Texas?
Lockhart, Texas uses zip code 78644.
What county is zip code 78644 in?
Zip code 78644 is located in Caldwell County, Texas.
What is the population of zip code 78644?
The population of zip code 78644 is 20,599 with a median age of 38.6.
Is 78644 in Lockhart, Texas?
Yes, zip code 78644 is in Lockhart, Caldwell County, Texas. The area code is 512.
Frequently Asked Questions
What city is zip code 78644 in?
Zip code 78644 is in Lockhart, Texas. It is part of Caldwell County and uses the Central (CST/CDT) timezone.
What is zip code 78644?
Zip code 78644 is a U.S. postal code in Lockhart, Texas (Caldwell County). It has a population of 20,599 and covers 186.6 square miles.
What is the population of zip code 78644?
The population of zip code 78644 (Lockhart, TX) is 20,599 with a median age of 38.6. There are approximately 7,660 housing units in this area.
What is the median income in zip code 78644?
The median household income in zip code 78644 (Lockhart, TX) is $72,155 per year. The cost of living index is 84 (100 = national average).
What is the average home price in zip code 78644?
The median home value in zip code 78644 (Lockhart, TX) is $242,900. The cost of living index is 84 compared to the national average of 100.
What county is zip code 78644 in?
Zip code 78644 is located in Caldwell County, Texas. The primary city is Lockhart.
What is the area code for zip code 78644?
Zip code 78644 in Lockhart, TX uses area code 512. It is located in the Central (CST/CDT) timezone.
Is zip code 78644 a good place to live?
Zip code 78644 (Lockhart, TX) has a cost of living index of 84 (100 = national average), a median household income of $72,155, and median home values of $242,900. The median age is 38.6. Visit the full page for demographics, climate, and nearby zip code comparisons.
What is the cost of living in zip code 78644?
The cost of living index for zip code 78644 (Lockhart, TX) is 84, where 100 represents the national average. This area is below the national average. Median home value: $242,900.
What schools serve zip code 78644?
Zip code 78644 in Lockhart, Texas is served by the local school district of Caldwell County. For specific school information, check your state's department of education or GreatSchools.org.
All demographic data on this page is sourced from the U.S. Census Bureau American Community Survey (ACS) 5-Year Estimates. ZIP code boundary and delivery data is sourced from the United States Postal Service (USPS). Data is updated periodically and may not reflect the most current figures. Census Bureau ZIP Code Tabulation Areas (ZCTAs) may differ slightly from USPS ZIP code boundaries.
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Data Sources
- Population, income, housing, age, and demographics
- U.S. Census Bureau, American Community Survey 5-Year Estimates, 2019-2023 vintage.
- ZIP to city and county mapping
- USPS and HUD-USPS ZIP-County Crosswalk.
- Time zones and area codes
- IANA tz database and NANPA.
- Elevation
- U.S. Geological Survey National Elevation Dataset (NED), via the USGS Elevation Point Query Service. Mapped to each ZCTA centroid coordinates. Last refreshed 2026-05-19.
- Last refreshed
- 2026-05-18.