78644 ZIP Code — Lockhart, TX

Caldwell County, Texas

ZIP code 78644 is located in Lockhart, Texas, within Caldwell County. It covers approximately 179.92 square miles and serves a population of 20,088 residents. This is a standard ZIP code in the Central (CT) timezone, served by area code 512.

About ZIP code 78644

The housing stock consists of a mix of housing types. Most homes were built in the 2000s, giving the area an established character. Median home value is $214,500. Owner-occupancy sits near the national average at 70%.

Median household income is $70,496. 35% of households receive Social Security income, suggesting a notable retiree or disability population.

The dominant occupation class is management, business, and professional, with education and healthcare as the leading industry. The average commute of 32 minutes is near the national average.

College attainment at 19% is below the national average, consistent with a trades and production-oriented local economy.

17% of residents lack health insurance, above the national average.

Overall, ZIP code 78644 reflects a community defined by a trades-oriented workforce and a significant Social Security-dependent population.

20,088

population

179.92

sq mi land

Standard

ZIP type

Central (CT)

timezone

78644 ZIP code map

Cities in ZIP code 78644

Below are the cities the US Postal Service accepts for ZIP code 78644. Using any city not on this list may result in mail delivery delays.

City	Status
Lockhart	Acceptable
Lockhart	Preferred

Nearby ZIP codes

78616 Dale (6.9 mi) 78656 Maxwell (9.2 mi) 78655 Martindale (10.4 mi) 78640 Kyle (12.6 mi) 78648 Luling (13.6 mi) 78662 Red Rock (14 mi) 78610 Buda (16.4 mi) 78747 Austin (16.8 mi) 78719 Austin (17.6 mi) 78953 Rosanky (18 mi) 78617 Del Valle (18.1 mi) 78632 Harwood (18.2 mi)

Demographics updated 06/2026

Population
Total population	20,088
Population density	112 / sq mi
State FIPS	48
County FIPS	055

Geography
Land area	179.92 sq mi
Water area	0.78 sq mi
Latitude	29.8892
Longitude	-97.6668
Timezone	Central (CT)
Area code	512

Total population by age

Gender

Race & ethnicity

Economics updated 06/2026

Household income

Income range	This ZIP	County avg	State avg
Under $50k	40.6%	43.7%	39.5%
$50k – $100k	36.8%	36.0%	30.1%
$100k – $200k	18.7%	16.9%	22.6%
Over $200k	3.9%	3.4%	7.8%

Demographics & statistics

20,088

Population

112

People per sq mi

38.7

Median age

$70,496

Median household income

$29,532

Per capita income

$214,500

Median home value

$1,133

Median monthly rent

69.6%

Home ownership

13.2%

Poverty rate

0.9%

Unemployment

5,267

Housing units

18.7%

Bachelor's or higher

Age distribution

Male Female

479

Under 5

570

605

5–9

720

655

10–14

780

501

15–19

596

646

20–24

770

1,330

25–34

1,583

1,097

35–44

1,306

1,108

45–54

1,318

573

55–59

683

666

60–64

793

940

65–74

1,119

401

75–84

478

169

85+

202

← Male

Female →

Age summary

Group	Count	%
Under 18	4,503	22.4%
18 and over	15,585	77.6%
65 and over	3,309	16.5%
Median age	38.7 years

Race & ethnicity

White 57.7%

Hispanic or Latino 18.1%

Two or more races 11.3%

Other race 8%

Black or African American 3.5%

Asian 1.1%

American Indian / Alaska Native 0.3%

Group	Count	%
White	14,154	57.7%
Hispanic or Latino	4,430	18.1%
Two or more races	2,774	11.3%
Other race	1,965	8%
Black or African American	855	3.5%
Asian	258	1.1%
American Indian / Alaska Native	82	0.3%

Household income

Income range	This ZIP	County avg	State avg
Under $50k	40.6%	43.7%	39.5%
$50k – $100k	36.8%	36.0%	30.1%
$100k – $200k	18.7%	16.9%	22.6%
Over $200k	3.9%	3.4%	7.8%

Under $10k 4.8%

$10k–$15k 4.2%

$15k–$25k 4.9%

$25k–$35k 11.7%

$35k–$50k 9.3%

$50k–$75k 20.0%

$75k–$100k 13.6%

$100k–$150k 18.7%

$150k–$200k 5.0%

$200k+ 7.9%

Range	% of households
Under $10k	4.8%
$10k–$15k	4.2%
$15k–$25k	4.9%
$25k–$35k	11.7%
$35k–$50k	9.3%
$50k–$75k	20.0%
$75k–$100k	13.6%
$100k–$150k	18.7%
$150k–$200k	5.0%
$200k+	7.9%
Median income	$70,496

Housing

Home values

Under $50k 10.0%

$50k–$100k 7.2%

$100k–$150k 16.0%

$150k–$200k 11.1%

$200k–$300k 28.7%

$300k–$500k 22.5%

$500k–$1M 3.7%

$1M+ 0.9%

Housing overview

Metric	Value
Median home value	$214,500
Median rent / month	$1,133
Owner occupied	69.6%
Renter occupied	30.4%
Vacant	9.6%
Single-family detached	67.8%
Large apartment buildings	3.4%
Mobile homes	14.1%
Median rooms	5.2
Avg household size (owned)	2.75

Year built

Era	%
2020 or later	1.3%
2010–2019	11.9%
2000–2009	19.1%
1990–1999	11.2%
1980–1989	19.1%
1970–1979	10.5%
1960–1969	7.6%
1950–1959	8.3%
1940–1949	5.9%
1939 or earlier	5.0%

Bedrooms

Size	% of units
No bedroom (studio)	1.6%
1 bedroom	3.4%
2 bedrooms	25.5%
3 bedrooms	52.6%
4 bedrooms	15.3%
5+ bedrooms	1.7%

Vehicles per household

Vehicles	% of households
No vehicle	3.2%
1 vehicle	29.9%
2 vehicles	35.2%
3 or more	31.7%

Heating fuel

Fuel type	%
Utility gas	21.3%
Electricity	72.7%
Propane / LP gas	5.5%
Wood	0.1%
No fuel used	0.5%

Households & families

Household type	Count	%
Married-couple family	3,577	54.5%
Cohabiting couple	289	4.4%
Male householder, no spouse	958	14.6%
Female householder, no spouse	1,741	26.5%
Households with children under 18	2,153	32.8%
Households with seniors (65+)	2,238	34.1%
Average household size	2.79

Marital status

Status	Male	Female
Never married	29.7%	30.2%
Married	57.3%	45.4%
Separated	1.9%	2.3%
Widowed	2.0%	10.3%
Divorced	9.1%	11.9%

Education

Less than 9th grade 4.5%

Some HS, no diploma 10.0%

HS graduate 41.8%

Some college, no degree 20.5%

Associate's degree 4.4%

Bachelor's degree 13.6%

Graduate / professional 5.1%

Metric	%
HS diploma or higher	85.5%
Bachelor's or higher	18.7%

School enrollment (ages 3–17)

Type	Count	%
Nursery / preschool	135	3.1%
Kindergarten	317	7.2%
Elementary school	2,107	47.7%
High school	1,093	24.7%
College / grad school	769	17.4%

Employment

Industry of employment

Education & healthcare 16.6%

Construction 15.8%

Retail trade 12.0%

Public administration 11.6%

Professional & management 10.4%

Arts, food & hospitality 9.8%

Manufacturing 5.9%

Finance & real estate 5.9%

Transportation & utilities 5.4%

Other services 3.4%

Wholesale trade 1.5%

Agriculture & mining 1.3%

Information 0.5%

Occupation

Category	%
Management, business & arts	33.1%
Service	15.9%
Sales & office	24.7%
Natural resources & construction	13.7%
Production & transportation	12.7%

Employment type

Type	%
Private sector	71.6%
Government	20.7%
Self-employed	7.4%
Unpaid family workers	0.3%

Commute

Method	%
Drive alone	79.5%
Carpool	7.4%
Public transit	0.0%
Walk	0.8%
Work from home	10.0%
Other means	2.3%
Avg commute (minutes)	32.1

Poverty

All people 13.2%

Under 18 years 19.4%

18 and over 11.2%

Married-couple families 6.0%

Female-led households 26.8%

Income support

Source	% of households
Social Security	34.6%
Retirement income	23.9%
Supplemental Security	5.8%
Cash public assistance	3.7%
Food stamps / SNAP	11.0%

Health indicators

Condition	%
Obesity	38.4%
High blood pressure	35.6%
High cholesterol	34.9%
Diabetes	13.0%
Heart disease	6.5%
Stroke	3.2%
Asthma	9.2%
Arthritis	22.7%
Kidney disease	3.1%
Pulmonary disease	6.9%
Cancer	5.5%

Behavior / access	%
Smoking	20.0%
Binge drinking	17.9%
No physical activity	30.5%
Less than 7 hrs sleep	33.2%
Depression	22.0%
Fair or poor health	20.5%
Poor mental health	16.0%
Poor physical health	12.5%
No health insurance	34.1%
Visited doctor (checkup)	69.2%
Visited dentist	50.4%
Cholesterol screening	87.6%
Teeth loss	16.7%

Veterans & disability

Veterans	Count	%
Civilian veterans	1,299	8.3%

Disability	%
Any disability	17.5%
Under 18	8.7%
18–64 years	12.3%
65 and over	48.0%

Health insurance coverage

Type	%
Private insurance	62.0%
Public insurance	34.8%
No insurance	16.6%
Uninsured under 19	8.9%

Language & origin

Language spoken at home (age 5+)

Language	Count	%
English only	19,039	94.8%
Spanish	1,885	9.9%
Other Indo-European	1,878	9.9%
Asian & Pacific Islander	0	0.0%
Other languages	0	0.0%

Place of birth & citizenship

Origin	Count	%
Native born (US)	18,723	93.2%
Born in same state	18,180	90.5%
Born in different state	15,078	75.1%
Foreign born	543	2.7%
Naturalized citizen	1,365	6.8%
Not a US citizen	527	38.6%

Ancestry

Ancestry	Count	%
Italian	1,357	6.8%
Arab	1,149	5.7%
French	1,002	5%
Polish	78	0.4%

Ancestry	Count	%
English	65	0.3%
Irish	52	0.3%
German	27	0.1%
Norwegian	15	0.1%

Technology access

Metric	% of households
Computer access	32.7%
Internet access	93.5%

Source: U.S. Census Bureau, American Community Survey 2025 estimates.

Frequently asked questions about ZIP code 78644

What city is ZIP code 78644 in?

ZIP code 78644 is primarily assigned to Lockhart, Texas.

What county is ZIP code 78644 in?

ZIP code 78644 falls within Caldwell County, Texas.

What is the population of ZIP code 78644?

ZIP code 78644 has an estimated population of 20,088 residents, with a density of 112 people per square mile.

What is the typical home value in ZIP code 78644?

The median home value in ZIP code 78644 is $214,500.

What is the median household income in ZIP code 78644?

The median household income in ZIP code 78644 is $70,496, below the national median of ~$75,000.

What timezone is ZIP code 78644 in?

ZIP code 78644 observes the CST timezone.