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ZIP 78664 · Round Rock

Who lives in ZIP code 78664 (Round Rock, TX): age, income, housing, education and work.

Source: uszips 2026 (ACS-based ZIP file)

2026 ZIP profile

Round Rock, TX · Williamson County

uszips 2026
People62,060
Median age35.1
Household income$87,417
Home value$358,148
Median rent$1,692/mo
Poverty10.2%
College degree+36.4%
Commute26 min

Place

Metro area
Austin-Round Rock-San Marcos, TX
Time zone
Central
Density
1,442 / sq mi
Housing units
23,484

Spans 2 counties

Williamson86%
Travis14%

Share of the ZIP's people in each county.

Age mix

Under 1010.5%
10–1914.5%
20s16.3%
30s16.5%
40s13.9%
50s12.6%
60s9.2%
70s4.6%
80+2.0%

10.8% are 65 or older; 77.7% are adults.

Household income

Under $25K7.6%
$25K–50K14.0%
$50K–75K21.1%
$75K–100K13.2%
$100K–150K19.6%
$150K+24.4%

44.0% of households earn $100K+. Median per person: $44,030.

Education (adults 25+)

Less than high school10.1%
High school22.2%
Some college31.3%
Bachelor's23.5%
Graduate12.9%

52.1% of degrees are in STEM fields.

Race

White47.6%
Black14.1%
Asian6.0%
Native American0.9%
Pacific Islander0.0%
Other6.6%
Two or more25.0%

35.8% Hispanic or Latino (of any race).

Households & family

Married
45.0%
Never married
37.2%
Divorced
14.0%
Widowed
3.8%
Family size
3.17
Dual-income families
62.4%

Housing

Own their home
53.7%
Rent burden
30.2%
Men / women
48% / 52%

Work

In labor force
75.0%
Unemployment
4.4%
Self-employed
12.4%
Farmers
0.4%

Community

Charitable givers
18.4%
Veterans
6.8%
With a disability
12.1%
No health insurance
16.0%
Limited English
5.7%

Source: uszips 2026 (ACS-based ZIP file). Shares are percentages of people, households or adults as the measure implies.

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