78731 ZIP Code — Austin, TX

Travis County, Texas

ZIP code 78731 is located in Austin, Texas, within Travis County. It covers approximately 8.75 square miles and serves a population of 26,314 residents. This is a standard ZIP code in the Central (CT) timezone, served by area code 512.

About ZIP code 78731

The housing stock consists of a significant share of large multi-unit buildings. Most homes were built in the 1970s, giving the area an established character. Median home value is $778,000. Owner-occupancy sits near the national average at 55%.

The gap between median ($98,555) and mean household income suggests income inequality — a small number of higher earners pull the average up.

The dominant occupation class is management, business, and professional, with professional and management as the leading industry. The average commute of 20 minutes is near the national average. Remote work is prevalent — 28% of workers work from home.

Educational attainment is high — 78% of residents hold a bachelor's degree or higher, well above the national average of 33%.

Overall, ZIP code 78731 reflects a community defined by a highly educated population and a high rate of remote workers.

26,314

population

8.75

sq mi land

Standard

ZIP type

Central (CT)

timezone

78731 ZIP code map

Cities in ZIP code 78731

Below are the cities the US Postal Service accepts for ZIP code 78731. Using any city not on this list may result in mail delivery delays.

City	Status
Austin	Acceptable
Austin	Preferred

Nearby ZIP codes

78757 Austin (2.2 mi) 78756 Austin (2.6 mi) 78751 Austin (3.6 mi) 78703 Austin (3.8 mi) 78759 Austin (3.9 mi) 78705 Austin (4.1 mi) 78730 Austin (4.2 mi) 78752 Austin (4.3 mi) 78746 Austin (4.3 mi) 78758 Austin (4.6 mi) 78712 Austin (4.7 mi) 78722 Austin (4.9 mi)

Demographics updated 06/2026

Population
Total population	26,314
Population density	3,007 / sq mi
State FIPS	48
County FIPS	453

Geography
Land area	8.75 sq mi
Water area	0.20 sq mi
Latitude	30.3450
Longitude	-97.7702
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	32.2%	30.7%	39.5%
$50k – $100k	23.0%	29.5%	30.1%
$100k – $200k	23.2%	27.7%	22.6%
Over $200k	21.6%	12.1%	7.8%

Demographics & statistics

26,314

Population

3,007

People per sq mi

40.4

Median age

$98,555

Median household income

$85,936

Per capita income

$778,000

Median home value

$1,484

Median monthly rent

54.8%

Home ownership

7.9%

Poverty rate

3.5%

Unemployment

8,372

Housing units

78.3%

Bachelor's or higher

Age distribution

Male Female

467

Under 5

447

759

5–9

726

719

10–14

687

467

15–19

446

842

20–24

804

2,428

25–34

2,321

2,057

35–44

1,966

1,569

45–54

1,500

705

55–59

674

1,038

60–64

992

1,152

65–74

1,102

555

75–84

531

695

85+

665

← Male

Female →

Age summary

Group	Count	%
Under 18	4,480	17.0%
18 and over	21,834	83.0%
65 and over	4,700	17.9%
Median age	40.4 years

Race & ethnicity

White 76.9%

Two or more races 7.5%

Asian 7.4%

Hispanic or Latino 5.6%

Other race 1.5%

Black or African American 1%

American Indian / Alaska Native 0.1%

Group	Count	%
White	21,430	76.9%
Two or more races	2,084	7.5%
Asian	2,071	7.4%
Hispanic or Latino	1,558	5.6%
Other race	426	1.5%
Black or African American	272	1%
American Indian / Alaska Native	31	0.1%

Household income

Income range	This ZIP	County avg	State avg
Under $50k	32.2%	30.7%	39.5%
$50k – $100k	23.0%	29.5%	30.1%
$100k – $200k	23.2%	27.7%	22.6%
Over $200k	21.6%	12.1%	7.8%

Under $10k 4.9%

$10k–$15k 1.7%

$15k–$25k 3.5%

$25k–$35k 5.2%

$35k–$50k 12.9%

$50k–$75k 13.5%

$75k–$100k 9.4%

$100k–$150k 13.2%

$150k–$200k 9.2%

$200k+ 26.5%

Range	% of households
Under $10k	4.9%
$10k–$15k	1.7%
$15k–$25k	3.5%
$25k–$35k	5.2%
$35k–$50k	12.9%
$50k–$75k	13.5%
$75k–$100k	9.4%
$100k–$150k	13.2%
$150k–$200k	9.2%
$200k+	26.5%
Median income	$98,555

Housing

Home values

Under $50k 1.2%

$50k–$100k 0.1%

$100k–$150k 2.9%

$150k–$200k 1.9%

$200k–$300k 4.5%

$300k–$500k 10.8%

$500k–$1M 50.8%

$1M+ 27.8%

Housing overview

Metric	Value
Median home value	$778,000
Median rent / month	$1,484
Owner occupied	54.8%
Renter occupied	45.2%
Vacant	7.0%
Single-family detached	47.4%
Large apartment buildings	20.4%
Mobile homes	0.1%
Median rooms	4.9
Avg household size (owned)	2.24

Year built

Era	%
2020 or later	0.8%
2010–2019	3.5%
2000–2009	3.2%
1990–1999	11.3%
1980–1989	22.3%
1970–1979	31.3%
1960–1969	12.3%
1950–1959	13.4%
1940–1949	0.9%
1939 or earlier	1.1%

Bedrooms

Size	% of units
No bedroom (studio)	4.6%
1 bedroom	22.0%
2 bedrooms	27.6%
3 bedrooms	21.7%
4 bedrooms	19.2%
5+ bedrooms	4.9%

Vehicles per household

Vehicles	% of households
No vehicle	6.7%
1 vehicle	43.6%
2 vehicles	38.9%
3 or more	10.9%

Heating fuel

Fuel type	%
Utility gas	45.4%
Electricity	52.9%
Propane / LP gas	1.0%
Solar	0.2%
No fuel used	0.5%

Households & families

Household type	Count	%
Married-couple family	5,478	40.8%
Cohabiting couple	762	5.7%
Male householder, no spouse	3,332	24.8%
Female householder, no spouse	3,860	28.7%
Households with children under 18	2,835	21.1%
Households with seniors (65+)	3,369	25.1%
Average household size	1.95

Marital status

Status	Male	Female
Never married	39.7%	28.3%
Married	51.0%	50.4%
Separated	0.3%	0.4%
Widowed	2.6%	9.9%
Divorced	6.5%	11.0%

Education

Less than 9th grade 0.6%

Some HS, no diploma 0.7%

HS graduate 5.9%

Some college, no degree 11.2%

Associate's degree 3.3%

Bachelor's degree 38.9%

Graduate / professional 39.4%

Metric	%
HS diploma or higher	98.7%
Bachelor's or higher	78.3%

School enrollment (ages 3–17)

Type	Count	%
Nursery / preschool	421	7.3%
Kindergarten	279	4.8%
Elementary school	2,304	39.9%
High school	985	17.1%
College / grad school	1,779	30.8%

Employment

Industry of employment

Professional & management 29.8%

Education & healthcare 23.9%

Finance & real estate 7.3%

Arts, food & hospitality 7.0%

Public administration 5.7%

Manufacturing 5.4%

Information 4.7%

Retail trade 4.4%

Construction 3.2%

Other services 3.1%

Wholesale trade 2.7%

Transportation & utilities 1.9%

Agriculture & mining 0.9%

Occupation

Category	%
Management, business & arts	74.8%
Service	8.1%
Sales & office	14.5%
Natural resources & construction	1.2%
Production & transportation	1.4%

Employment type

Type	%
Private sector	75.3%
Government	16.8%
Self-employed	7.7%
Unpaid family workers	0.2%

Commute

Method	%
Drive alone	62.3%
Carpool	4.0%
Public transit	2.9%
Walk	0.2%
Work from home	28.3%
Other means	2.2%
Avg commute (minutes)	19.5

Poverty

All people 7.9%

Under 18 years 5.8%

18 and over 8.3%

Married-couple families 3.0%

Female-led households 9.7%

Income support

Source	% of households
Social Security	23.9%
Retirement income	18.1%
Supplemental Security	1.7%
Cash public assistance	0.7%
Food stamps / SNAP	0.7%

Health indicators

Condition	%
Obesity	23.5%
High blood pressure	24.1%
High cholesterol	31.8%
Diabetes	6.4%
Heart disease	4.6%
Stroke	1.9%
Asthma	7.9%
Arthritis	17.5%
Kidney disease	2.1%
Pulmonary disease	3.4%
Cancer	6.4%

Behavior / access	%
Smoking	8.2%
Binge drinking	19.3%
No physical activity	12.8%
Less than 7 hrs sleep	25.9%
Depression	20.9%
Fair or poor health	8.1%
Poor mental health	11.8%
Poor physical health	6.5%
No health insurance	12.6%
Visited doctor (checkup)	70.2%
Visited dentist	71.3%
Cholesterol screening	90.9%
Teeth loss	5.2%

Veterans & disability

Veterans	Count	%
Civilian veterans	964	4.4%

Disability	%
Any disability	7.9%
Under 18	4.6%
18–64 years	4.5%
65 and over	23.2%

Health insurance coverage

Type	%
Private insurance	85.5%
Public insurance	20.4%
No insurance	7.2%
Uninsured under 19	3.9%

Language & origin

Language spoken at home (age 5+)

Language	Count	%
English only	25,400	96.5%
Spanish	816	3.2%
Other Indo-European	198	0.8%
Asian & Pacific Islander	72	0.3%
Other languages	521	2.1%

Place of birth & citizenship

Origin	Count	%
Native born (US)	23,086	87.7%
Born in same state	22,356	85.0%
Born in different state	12,330	46.9%
Foreign born	730	2.8%
Naturalized citizen	3,228	12.3%
Not a US citizen	1,398	43.3%

Ancestry

Ancestry	Count	%
French	4,169	15.8%
Italian	3,144	11.9%
Arab	1,094	4.2%
English	315	1.2%
Polish	300	1.1%

Ancestry	Count	%
Irish	274	1%
Dutch	226	0.9%
Norwegian	180	0.7%
German	100	0.4%

Technology access

Metric	% of households
Computer access	51.0%
Internet access	98.3%

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

Frequently asked questions about ZIP code 78731

What city is ZIP code 78731 in?

ZIP code 78731 is primarily assigned to Austin, Texas.

What county is ZIP code 78731 in?

ZIP code 78731 falls within Travis County, Texas.

How educated is the population of ZIP code 78731?

78% of residents hold a bachelor's degree or higher — well above the national average of ~33%, reflecting a highly educated population.

What is the typical home value in ZIP code 78731?

The median home value in ZIP code 78731 is $778,000.

What is the population of ZIP code 78731?

ZIP code 78731 has an estimated population of 26,314 residents, with a density of 3,009 people per square mile.

What is the median household income in ZIP code 78731?

The median household income in ZIP code 78731 is $98,555, above the national median of ~$75,000.

What timezone is ZIP code 78731 in?

ZIP code 78731 observes the CST timezone.