78642 ZIP Code — Liberty Hill, TX

Williamson County, Texas

ZIP code 78642 is located in Liberty Hill, Texas, within Williamson County. It covers approximately 111.13 square miles and serves a population of 20,699 residents. This is a standard ZIP code in the Central (CT) timezone, served by area code 512/737.

About ZIP code 78642

The housing stock consists of predominantly single-family detached homes. Much of the housing stock is relatively new, reflecting recent development activity. Median home value is $454,600. Owner-occupancy is high at 86%, well above the national average.

Median household income is $117,490. The poverty rate of 4% is below the national average.

The dominant occupation class is management, business, and professional, with education and healthcare as the leading industry. The average commute of 34 minutes is near the national average. Remote work is prevalent — 21% of workers work from home.

Educational attainment is near the national average, with 42% of residents holding a bachelor's degree or higher.

Overall, ZIP code 78642 reflects a community defined by high homeownership and a high rate of remote workers.

20,699

population

111.13

sq mi land

Standard

ZIP type

Central (CT)

timezone

78642 ZIP code map

Cities in ZIP code 78642

Below are the cities the US Postal Service accepts for ZIP code 78642. Using any city not on this list may result in mail delivery delays.

City	Status
Liberty Hill	Preferred

Nearby ZIP codes

78605 Bertram (7 mi) 78633 Georgetown (11.1 mi) 78628 Georgetown (11.2 mi) 78641 Leander (11.6 mi) 78641 Leander (11.6 mi) 76527 Florence (11.9 mi) 78613 Cedar Park (15.7 mi) 78608 Briggs (16 mi) 78717 Austin (17.4 mi) 78681 Round Rock (17.5 mi) 78681 Round Rock (17.5 mi) 78645 Leander (18.1 mi)

Demographics updated 06/2026

Population
Total population	20,699
Population density	186 / sq mi
State FIPS	48
County FIPS	491

Geography
Land area	111.13 sq mi
Water area	0.56 sq mi
Latitude	30.7010
Longitude	-97.9330
Timezone	Central (CT)
Area code	512/737

Total population by age

Gender

Race & ethnicity

Economics updated 06/2026

Household income

Income range	This ZIP	County avg	State avg
Under $50k	23.3%	23.0%	39.5%
$50k – $100k	27.0%	30.5%	30.1%
$100k – $200k	35.2%	34.7%	22.6%
Over $200k	14.5%	11.8%	7.8%

Demographics & statistics

20,699

Population

186

People per sq mi

36.2

Median age

$117,490

Median household income

$44,513

Per capita income

$454,600

Median home value

$1,415

Median monthly rent

85.5%

Home ownership

3.5%

Poverty rate

6.2%

Unemployment

6,122

Housing units

41.7%

Bachelor's or higher

Age distribution

Male Female

819

Under 5

873

661

5–9

704

812

10–14

866

744

15–19

793

546

20–24

583

1,279

25–34

1,364

1,441

35–44

1,536

1,555

45–54

1,657

692

55–59

737

396

60–64

422

727

65–74

776

270

75–84

287

85+

← Male

Female →

Age summary

Group	Count	%
Under 18	5,849	28.3%
18 and over	14,850	71.7%
65 and over	2,219	10.7%
Median age	36.2 years

Race & ethnicity

White 73.3%

Hispanic or Latino 10.4%

Two or more races 9.1%

Other race 4.4%

Black or African American 1.8%

Asian 0.7%

American Indian / Alaska Native 0.3%

Group	Count	%
White	16,928	73.3%
Hispanic or Latino	2,410	10.4%
Two or more races	2,092	9.1%
Other race	1,023	4.4%
Black or African American	422	1.8%
Asian	164	0.7%
American Indian / Alaska Native	70	0.3%

Household income

Income range	This ZIP	County avg	State avg
Under $50k	23.3%	23.0%	39.5%
$50k – $100k	27.0%	30.5%	30.1%
$100k – $200k	35.2%	34.7%	22.6%
Over $200k	14.5%	11.8%	7.8%

Under $10k 1.7%

$10k–$15k 0.7%

$15k–$25k 1.8%

$25k–$35k 3.5%

$35k–$50k 7.1%

$50k–$75k 12.6%

$75k–$100k 16.1%

$100k–$150k 21.4%

$150k–$200k 17.8%

$200k+ 17.2%

Range	% of households
Under $10k	1.7%
$10k–$15k	0.7%
$15k–$25k	1.8%
$25k–$35k	3.5%
$35k–$50k	7.1%
$50k–$75k	12.6%
$75k–$100k	16.1%
$100k–$150k	21.4%
$150k–$200k	17.8%
$200k+	17.2%
Median income	$117,490

Housing

Home values

Under $50k 4.4%

$50k–$100k 2.8%

$100k–$150k 2.0%

$150k–$200k 1.9%

$200k–$300k 13.1%

$300k–$500k 35.5%

$500k–$1M 37.5%

$1M+ 2.8%

Housing overview

Metric	Value
Median home value	$454,600
Median rent / month	$1,415
Owner occupied	85.5%
Renter occupied	14.5%
Vacant	3.4%
Single-family detached	79.5%
Large apartment buildings	1.0%
Mobile homes	11.3%
Median rooms	6.5
Avg household size (owned)	2.86

Year built

Era	%
2020 or later	9.3%
2010–2019	47.0%
2000–2009	19.8%
1990–1999	10.6%
1980–1989	7.9%
1970–1979	2.1%
1960–1969	0.9%
1950–1959	0.6%
1940–1949	0.1%
1939 or earlier	1.7%

Bedrooms

Size	% of units
No bedroom (studio)	2.1%
1 bedroom	2.5%
2 bedrooms	7.2%
3 bedrooms	42.1%
4 bedrooms	39.1%
5+ bedrooms	7.0%

Vehicles per household

Vehicles	% of households
No vehicle	2.4%
1 vehicle	17.2%
2 vehicles	43.8%
3 or more	36.6%

Heating fuel

Fuel type	%
Utility gas	15.9%
Electricity	68.5%
Propane / LP gas	13.7%
Fuel oil	0.8%
Wood	0.6%
Solar	0.1%
No fuel used	0.1%

Households & families

Household type	Count	%
Married-couple family	4,667	67.9%
Cohabiting couple	435	6.3%
Male householder, no spouse	688	10.0%
Female householder, no spouse	1,087	15.8%
Households with children under 18	2,978	43.3%
Households with seniors (65+)	1,508	21.9%
Average household size	3.00

Marital status

Status	Male	Female
Never married	30.5%	22.7%
Married	61.6%	59.9%
Separated	0.7%	0.7%
Widowed	1.6%	6.2%
Divorced	5.6%	10.5%

Education

Less than 9th grade 5.2%

Some HS, no diploma 3.6%

HS graduate 21.2%

Some college, no degree 20.2%

Associate's degree 8.1%

Bachelor's degree 30.2%

Graduate / professional 11.5%

Metric	%
HS diploma or higher	91.2%
Bachelor's or higher	41.7%

School enrollment (ages 3–17)

Type	Count	%
Nursery / preschool	471	8.7%
Kindergarten	371	6.9%
Elementary school	2,335	43.4%
High school	1,469	27.3%
College / grad school	739	13.7%

Employment

Industry of employment

Education & healthcare 18.6%

Professional & management 14.3%

Retail trade 13.2%

Construction 11.7%

Manufacturing 8.9%

Finance & real estate 7.2%

Other services 6.3%

Public administration 6.2%

Arts, food & hospitality 6.1%

Wholesale trade 3.3%

Transportation & utilities 2.5%

Information 1.0%

Agriculture & mining 0.5%

Occupation

Category	%
Management, business & arts	44.8%
Service	14.9%
Sales & office	17.2%
Natural resources & construction	11.1%
Production & transportation	11.9%

Employment type

Type	%
Private sector	79.7%
Government	12.3%
Self-employed	8.0%
Unpaid family workers	0.0%

Commute

Method	%
Drive alone	68.8%
Carpool	6.7%
Public transit	0.9%
Walk	0.3%
Work from home	21.1%
Other means	2.1%
Avg commute (minutes)	33.6

Poverty

All people 3.5%

Under 18 years 0.8%

18 and over 4.5%

Married-couple families 0.6%

Female-led households 7.9%

Income support

Source	% of households
Social Security	19.4%
Retirement income	20.1%
Supplemental Security	2.7%
Cash public assistance	0.2%
Food stamps / SNAP	3.5%

Health indicators

Condition	%
Obesity	32.3%
High blood pressure	31.9%
High cholesterol	36.0%
Diabetes	9.8%
Heart disease	5.6%
Stroke	2.5%
Asthma	8.8%
Arthritis	23.8%
Kidney disease	2.5%
Pulmonary disease	6.0%
Cancer	6.1%

Behavior / access	%
Smoking	16.1%
Binge drinking	20.7%
No physical activity	19.8%
Less than 7 hrs sleep	31.6%
Depression	22.7%
Fair or poor health	13.1%
Poor mental health	14.4%
Poor physical health	9.9%
No health insurance	20.1%
Visited doctor (checkup)	70.3%
Visited dentist	62.6%
Cholesterol screening	90.7%
Teeth loss	11.0%

Veterans & disability

Veterans	Count	%
Civilian veterans	1,403	9.4%

Disability	%
Any disability	10.8%
Under 18	7.7%
18–64 years	8.9%
65 and over	29.5%

Health insurance coverage

Type	%
Private insurance	77.9%
Public insurance	18.0%
No insurance	13.3%
Uninsured under 19	8.3%

Language & origin

Language spoken at home (age 5+)

Language	Count	%
English only	19,007	91.8%
Spanish	1,176	6.2%
Other Indo-European	1,102	5.8%
Asian & Pacific Islander	39	0.2%
Other languages	30	0.2%

Place of birth & citizenship

Origin	Count	%
Native born (US)	19,261	93.1%
Born in same state	18,983	91.7%
Born in different state	12,261	59.2%
Foreign born	278	1.3%
Naturalized citizen	1,438	6.9%
Not a US citizen	500	34.8%

Ancestry

Ancestry	Count	%
French	2,225	10.7%
Arab	1,771	8.6%
Italian	1,539	7.4%
Polish	306	1.5%
German	158	0.8%

Ancestry	Count	%
English	133	0.6%
Norwegian	123	0.6%
Dutch	69	0.3%
Irish	18	0.1%

Technology access

Metric	% of households
Computer access	33.2%
Internet access	97.3%

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

Frequently asked questions about ZIP code 78642

What city is ZIP code 78642 in?

ZIP code 78642 is primarily assigned to Liberty Hill, Texas.

What county is ZIP code 78642 in?

ZIP code 78642 falls within Williamson County, Texas.

Is ZIP code 78642 mostly owner-occupied?

86% of occupied units in ZIP code 78642 are owner-occupied, well above the national average.

What is the typical home value in ZIP code 78642?

The median home value in ZIP code 78642 is $454,600.

Does ZIP code 78642 have a large veteran population?

9% of civilians in ZIP code 78642 are veterans, above the national average of ~7%.

What is the median household income in ZIP code 78642?

The median household income in ZIP code 78642 is $117,490, above the national median of ~$75,000.

What timezone is ZIP code 78642 in?

ZIP code 78642 observes the CST timezone.