Zip code 78664: Round Rock, Texas

Q: What city is zip code 78664?

78664 is assigned to Round Rock, Texas. The city name is the one the Postal Service prefers for mail addressed to this zip code.

Q: What county is 78664 in?

78664 is mostly in Williamson County, but it extends into 1 other county.

Q: What is the population of 78664?

About 62,060 people live in 78664, according to the Census Bureau's American Community Survey.

Q: What is the median household income in 78664?

The median household income in 78664 is $87,417.

Q: What zip codes are near 78664?

The closest zip codes to 78664 are 78665, 78764, 78728, 78691, 78681.

Residential delivery areaWilliamson CountyCentral Time

Population

62,060

Median household income

$87K

U.S. $81K

Median home value

$358K

U.S. $333K

Median rent

$1,692/mo

U.S. $1,413

Median age

35.1

U.S. 38.9

Land area

17 sq mi

3,736 people/sq mi

Boundary is the Census Bureau's ZIP Code Tabulation Area, which closely tracks the postal delivery area.

About 78664

78664 is an urban zip code in Round Rock, Texas (Williamson County), covering 17 sq mi of land. About 62,060 people live here, or 3,736 per square mile. The median resident is 35.1 years old, compared with 38.9 nationally.

The median household earns $87,417 a year, close to the national median of $80,734. 10.2% of residents live below the poverty line (U.S.: 12.5%). A typical home is valued at $358,200, or 4.1 years of median household income (U.S.: 4.1 years), which makes homes about as affordable as the national average for local earners. 54% of occupied homes are lived in by their owners, and renters pay a median of $1,692 a month.

36% of adults hold a bachelor's degree or higher (U.S.: 36%). Commuters average 25.6 minutes each way, and 23% of workers work from home. The most common jobs among working residents are in office and administrative support; management; and sales. 37% of households speak a language other than English at home, most often Spanish.

How 78664 compares

Sorted from highest to lowest national percentile

Tech workers8.6%
94th
U.S. 3.8% · TX 3.8%77th of 1,810 in TX
Diversity index69.1
92nd
U.S. 61.4 · TX 67.1112th of 1,818 in TX
Population62,060
90th
U.S. 334,922,499 · TX 30,188,42472nd of 1,818 in TX
Uninsured rate16%
90th
WeaknessU.S. 8.4% · TX 17.1%877th of 1,808 in TX
Work from home22.5%
83rd
U.S. 15.1% · TX 14.4%168th of 1,810 in TX
Broadband access95.4%
79th
U.S. 91% · TX 91.4%326th of 1,792 in TX
Population density3,736/sq mi
73rd
U.S. 95/sq mi · TX 116/sq mi226th of 1,818 in TX
Foreign-born residents18.1%
71st
U.S. 14.1% · TX 17.6%401st of 1,818 in TX
Median gross rent$1,692
67th
U.S. $1,413 · TX $1,403238th of 1,511 in TX
Veterans6.8%
63rd
U.S. 6.2% · TX 6.2%813th of 1,818 in TX
Per capita income$43,876
60th
U.S. $44,673 · TX $40,752406th of 1,813 in TX
Median household income$87,417
59th
U.S. $80,734 · TX $78,476437th of 1,712 in TX
Bachelor's degree or higher36.4%
59th
U.S. 35.7% · TX 33.8%381st of 1,811 in TX
Government workers14.9%
59th
U.S. 14.5% · TX 14.1%909th of 1,810 in TX
Median home value$358,200
55th
U.S. $332,700 · TX $283,800287th of 1,679 in TX
Median earnings per worker$48,986
53rd
U.S. $49,666 · TX $47,575628th of 1,794 in TX
Residents under 1822.3%
52nd
U.S. 22% · TX 25%1,102nd of 1,818 in TX
Average commute25.6 min
47th
U.S. 26.4 min · TX 26.7 min968th of 1,738 in TX
Poverty rate10.2%
46th
U.S. 12.5% · TX 13.8%1,102nd of 1,794 in TX
Self-employed workers9%
46th
U.S. 10% · TX 10.5%1,209th of 1,810 in TX
Rent-burdened renters49.5%
45th
U.S. 51.1% · TX 51.7%782nd of 1,692 in TX
Unemployment rate4.4%
41st
U.S. 5.2% · TX 5.3%900th of 1,810 in TX
Income inequality (Gini)0.405
24th
U.S. 0.483 · TX 0.4781,215th of 1,785 in TX
Housing vacancy4.1%
23rd
U.S. 10.1% · TX 9.4%1,633rd of 1,794 in TX
Median age35.1
22nd
U.S. 38.9 · TX 35.61,262nd of 1,817 in TX
Homeownership rate53.7%
22nd
U.S. 65.2% · TX 62.6%1,496th of 1,792 in TX
Healthcare workers7.5%
21st
U.S. 9.7% · TX 8.6%989th of 1,810 in TX
Residents 65 and older10.8%
12th
U.S. 17.2% · TX 13.4%1,468th of 1,818 in TX

Measure	78664	Williamson	TX	U.S.	National percentile	Rank in TX
Tech workers	8.6%	9.6%	3.8%	3.8%	94th	77th of 1,810
Diversity index	69.1	63.8	67.1	61.4	92nd	112th of 1,818
Population	62,060	672,688	30,188,424	334,922,499	90th	72nd of 1,818
Uninsured rateWeakness	16%	9.8%	17.1%	8.4%	90th	877th of 1,808
Work from home	22.5%	25.4%	14.4%	15.1%	83rd	168th of 1,810
Broadband access	95.4%	95.8%	91.4%	91%	79th	326th of 1,792
Population density	3,736/sq mi	603/sq mi	116/sq mi	95/sq mi	73rd	226th of 1,818
Foreign-born residents	18.1%	16.2%	17.6%	14.1%	71st	401st of 1,818
Median gross rent	$1,692	$1,796	$1,403	$1,413	67th	238th of 1,511
Veterans	6.8%	7.6%	6.2%	6.2%	63rd	813th of 1,818
Per capita income	$43,876	$53,505	$40,752	$44,673	60th	406th of 1,813
Median household income	$87,417	$111,340	$78,476	$80,734	59th	437th of 1,712
Bachelor's degree or higher	36.4%	48.4%	33.8%	35.7%	59th	381st of 1,811
Government workers	14.9%	13.9%	14.1%	14.5%	59th	909th of 1,810
Median home value	$358,200	$447,000	$283,800	$332,700	55th	287th of 1,679
Median earnings per worker	$48,986	$61,236	$47,575	$49,666	53rd	628th of 1,794
Residents under 18	22.3%	24.1%	25%	22%	52nd	1,102nd of 1,818
Average commute	25.6 min	27.9 min	26.7 min	26.4 min	47th	968th of 1,738
Poverty rate	10.2%	6.4%	13.8%	12.5%	46th	1,102nd of 1,794
Self-employed workers	9%	9.5%	10.5%	10%	46th	1,209th of 1,810
Rent-burdened renters	49.5%	48%	51.7%	51.1%	45th	782nd of 1,692
Unemployment rate	4.4%	3.9%	5.3%	5.2%	41st	900th of 1,810
Income inequality (Gini)	0.405	0.415	0.478	0.483	24th	1,215th of 1,785
Housing vacancy	4.1%	3.9%	9.4%	10.1%	23rd	1,633rd of 1,794
Median age	35.1	37.3	35.6	38.9	22nd	1,262nd of 1,817
Homeownership rate	53.7%	66.4%	62.6%	65.2%	22nd	1,496th of 1,792
Healthcare workers	7.5%	7.6%	8.6%	9.7%	21st	989th of 1,810
Residents 65 and older	10.8%	12.9%	13.4%	17.2%	12th	1,468th of 1,818

The percentile is the share of Americans who live in a zip code with a lower value, so the 50th percentile is typical. Rank 1 is the highest value in the state. Both include zip codes with at least 100 residents. Strengths and weaknesses mark measures in the best or worst fifth nationally, where higher or lower is clearly better (income, poverty, education, commute, broadband, insurance and similar). Measures like age or density are left unmarked.

People

Age

Under 5

17%

5–17

11%

18–24

17%

25–34

16%

35–44

13%

45–54

11%

55–64

65–74

75+

Median age

35.1

Under 18

22.3%

65 and over

10.8%

Race and ethnicity

White40%
Black14%
Hispanic36%
Asian6%
Native American0.1%
Pacific Islander0%
Other0.9%
Multiracial4%

Diversity index

69.1

U.S. 61.4

Foreign-born

18.1%

U.S. 14.1%

Born in state

49.2%

Language spoken at home (households)

English only

63%

Spanish

24%

Other Indo-European

Asian / Pacific

Other

Households

Households: 23,484
Average household size: 2.6
Family households: 66.8%
Married couples: 44.1%
Living alone: 24.7%
Veterans (of adults): 6.8%
Male / female: 48% / 52%

Income and poverty

Household income distribution

<$25k

$25–50k

14%

$50–75k

21%

$75–100k

13%

$100–150k

20%

$150–200k

12%

$200k+

13%

Median household income

78664

$87,417

Williamson Co.

$111,340

Texas

$78,476

United States

$80,734

Per capita income

$43,876

U.S. $44,673

Poverty rate

10.2%

U.S. 12.5%

Households earning $150K+

24.4%

U.S. 23%

Income inequality (Gini)

0.405

U.S. 0.483

Housing

Median home value

78664

$358,200

Williamson Co.

$447,000

Texas

$283,800

United States

$332,700

Median gross rent

78664

$1,692

Williamson Co.

$1,796

Texas

$1,403

United States

$1,413

Types of housing

Single-family

68%

2–4 units

5–19 units

13%

20+ units

11%

Mobile home

Boat, RV, van

Housing units: 24,497
Owner-occupied: 53.7%
Vacant: 4.1%
Median year built: 1997
Median rooms: 5.2
Renters paying 30%+ of income: 49.5%
Renters paying 50%+ of income: 21%
Home value to income: 4.1× (U.S. 4.1×)

Work and commute

How people get to work

Drove alone

65%

Carpooled

10%

Transit

0.1%

Walked

Bicycle

0.0%

Worked from home

23%

Other

Commute time (one way)

<10 min

10%

10–19

28%

20–29

24%

30–44

24%

45–59

60+

Average commute

25.6 min

U.S. 26.4 min

Unemployment

4.4%

U.S. 5.2%

In labor force

75%

U.S. 63.5%

Jobs and careers

What employed residents do, wherever they work

Occupations

Office and admin

13%

Management

11%

Sales

10%

Computer and math

Healthcare

Business and finance

Construction and repair

Production

Transportation and moving

Food service

Cleaning and personal care

Engineering and science

Education

Legal and social services

Arts, media and sports

Police and fire

Farming, fishing and forestry

0.0%

Industries

Professional and technical services

12%

Retail

12%

Health care and social assistance

12%

Manufacturing

10%

Restaurants and hotels

Education

Construction

Other services

Public administration

Admin, support and management

Finance, insurance and real estate

Transportation, warehousing and utilities

Information

Wholesale

Arts and recreation

Agriculture and mining

0.3%

Median earnings per worker

$48,986

U.S. $49,666

Self-employed

U.S. 10%

Government workers

14.9%

U.S. 14.5%

Nonprofit workers

5.9%

U.S. 8.8%

Median earnings by type of work

Type of work	78664	U.S.
Management, business, science and arts	$73,607	$74,888
Service	$30,184	$26,804
Sales and office	$37,815	$40,476
Construction and maintenance	$51,908	$49,199
Production and transportation	$36,556	$39,989

Education, internet and health coverage

Highest education (adults 25+)

No diploma

10%

High school

22%

Some college

22%

Associate's

10%

Bachelor's

23%

Graduate

13%

High school graduate or higher: 89.9%
Bachelor's degree or higher: 36.4%
Graduate or professional degree: 12.9%
Households with broadband: 95.4%
Cable, fiber or DSL: 86.3%
No internet access: 3%
Without health insurance: 16%
Limited-English households: 5.7%

Geography

City (USPS): Round Rock
State: Texas
County: Williamson County
Center point: 30.5054° N, 97.6473° W
Land area: 17 sq mi
Water area: 0.1 sq mi
Time zone: Central Time (UTC-6, UTC-5 in summer)
Zip type: Residential delivery area

78664 spans 2 counties

Williamson County86% of land
Travis County14% of land

Cities and towns within this zip

Round Rock72% of zip
Pflugerville10% of zip

Census places overlapping the zip's area. Mail may use a different city name than the municipality.

Zip codes near 78664

Search by radius

Zip	City	Distance	Population	IncomeMedian income	Home value
78665	Round Rock, TX	3.1 mi	66,171	$122,680	$474,100
78764	Austin, TX · PO box	4.2 mi	—	—	—
78728	Austin, TX	4.3 mi	26,777	$75,243	$437,000
78691	Pflugerville, TX · PO box	4.8 mi	—	—	—
78681	Round Rock, TX	4.8 mi	56,691	$137,819	$497,300
78660	Pflugerville, TX	5.5 mi	124,834	$113,205	$411,900
78717	Austin, TX	6.4 mi	37,262	$145,325	$652,200
78727	Austin, TX	6.7 mi	29,958	$110,379	$540,400
78634	Hutto, TX	7.2 mi	46,413	$114,426	$375,200
78729	Austin, TX	7.3 mi	30,460	$86,438	$476,200
78753	Austin, TX	8.6 mi	56,920	$65,170	$371,300
78758	Austin, TX	8.9 mi	49,617	$74,381	$440,200

Zip codes like 78664 elsewhere

Matched on income, home values, age, density, education, housing and commuting

Questions about 78664

What city is zip code 78664?

78664 is assigned to Round Rock, Texas. The city name is the one the Postal Service prefers for mail addressed to this zip code.

What county is 78664 in?

78664 is mostly in Williamson County, but it extends into 1 other county.

What is the population of 78664?

About 62,060 people live in 78664, according to the Census Bureau's American Community Survey.

What time zone is 78664 in?

78664 is in Central Time.

What is the median household income in 78664?

The median household income in 78664 is $87,417.

What zip codes are near 78664?

The closest zip codes to 78664 are 78665, 78764, 78728, 78691, 78681.

Demographic figures are 2020–2024 American Community Survey 5-year estimates for ZIP Code Tabulation Area 78664, from the U.S. Census Bureau. Small areas have wide margins of error. How we build these numbers.