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ZIP code

78664

Round Rock, TX

STANDARD

78664 covers Round Rock in Williamson County, with 62,272 people in the ACS 2023 estimate.

Figures are for the Census ZIP Code Tabulation Area (ZCTA), which is not the same as a USPS ZIP code. A PO Box or unique ZIP may have no ZCTA and no demographics. Methodology

ACS 2023 population

62,272

Median household income

$85,919

Median home value

$317,400

U.S. Census Bureau, ACS 2019–2023 5-year (vintage 2023). Geography: ZCTA 78664. Methodology

ZIP code map of 78664

Census ZCTA boundary for ZIP 78664 in Round Rock, Texas
Census ZCTA boundary for ZIP 78664 in Round Rock, Texas. A ZCTA is not the same as a USPS ZIP code. Boundaries: U.S. Census Bureau. Methodology · Data sources
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About ZIP code 78664

Type

STANDARD

City

Round Rock

County

Williamson County

Timezone

America/Chicago

Area codes

512, 737

Land area

16.6 sq mi

Water area

0.09 sq mi

Households

24,259

Median gross rent

$1,645

More enterprise fields

Timezone
America/Chicago
Area Codes
512, 737
World Region
NA
Country
US

Commercial ZIP directory · not ACS

Commercial ZIP directory population_count for ZCTA 78664. Not ACS. Methodology

People in 78664

Race

  • White29,365
  • Black or African American7,300
  • American Indian or Alaska Native652
  • Asian4,056
  • Native Hawaiian and Pacific Islander129
  • Other race7,353
  • Two or more races11,432

Hispanic or Latino (any race): 21,595

Age

  • Under 108,065
  • 10 to 198,826
  • 20 to 298,732
  • 30 to 3910,211
  • 40 to 498,650
  • 50 to 597,114
  • 60 to 695,147
  • 70 to 792,574
  • 80 and older968

Income and housing in 78664

Poverty rate

10.5%

Median earnings

$45,700

Median household income

$85,919

Median home value

$317,400

Median gross rent

$1,645

Education

  • High school graduate90.2%
  • Bachelor's degree34.6%
  • Graduate degree12.1%

Places covering 78664

Cities and places — Population overlap

Share of this ZIP/ZCTA’s population located within each place, based on ZIP Code Database place-overlap data. This is a population measure, not land-area overlap or the Census-place population.

ZIP Code Database place-overlap table, field percent_of_zip_population_in_place, keyed by place_geoid. Not ACS 2019–2023. Overlap vintage is the shipped overlap table and is separate from ACS. Methodology

Counties — Population overlap

Share of this ZIP/ZCTA’s population located within each county, based on ZIP Code Database county-overlap data. This is a population measure, not land-area overlap or the Census county population.

ZIP Code Database county-overlap table, field percent_of_zip_population_in_county, keyed by county_geoid. Not ACS 2019–2023. Overlap vintage is the shipped overlap table and is separate from ACS. Methodology

11.3% of this ZIP is outside city limits (a real overlap row, not missing data).

Population history for 78664

IRS populationACS population
74,21937,109020052023

Hover the chart or read the table below (Year | ACS | IRS).

Population history. Year | ACS population | IRS population. ACS and IRS are separate series. Blank cells mean that source did not publish a count for the year.
YearACS populationIRS population
200567,278
200668,721
200751,564
200850,195
200951,693
201052,586
201151,94253,040
201254,86452,830
201357,80653,800
201458,95954,360
201559,76555,090
201660,88453,470
201761,36153,910
201862,18354,060
201964,68654,700
202063,66153,410
202160,15250,990
202262,16851,270
202362,272

ACS: U.S. Census Bureau American Community Survey 5-year estimates. IRS: Statistics of Income ZIP Code data.

ZIP codes near 78664

12 nearest ZIP centroids (any distance)

  1. 78665Round Rock3.1 miPop 64,087 · Income $117,240
  2. 78728Austin4.4 miPop 26,776 · Income $74,048
  3. 78681Round Rock4.8 miPop 58,531 · Income $136,215
  4. 78660Pflugerville5.5 miPop 118,437 · Income $109,522
  5. 78717Austin6.4 miPop 36,085 · Income $140,483
  6. 78727Austin6.7 miPop 30,894 · Income $107,194
  7. 78634Hutto7.2 miPop 43,466 · Income $111,227
  8. 78729Austin7.3 miPop 30,440 · Income $81,589
  9. 78753Austin8.6 miPop 58,449 · Income $62,334
  10. 78758Austin8.9 miPop 50,592 · Income $69,019
  11. 78750Austin9.4 miPop 29,322 · Income $123,722
  12. 78798Austin9.6 miPop — · Income —

ZIP centroids within 2 miles

No other ZIP codes within 2 miles of 78664, measured by Census internal-point centroids. Try a wider radius.

ZIPs within 2 miles of this place

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78664 Round Rock, TX

Looking up ZIP codes within 2 miles of 78664 Round Rock, TX, measured by centroid distance.

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ZIP code 78664 FAQ

What city is ZIP code 78664 in?
78664 is in Round Rock, TX.
What county is 78664 in?
78664 is in Williamson County.
What is the median household income in 78664?
The median household income in 78664 is $85,919.
Which ZIP codes are near 78664?
Use the radius tool on this page to list ZIP codes within a chosen distance of 78664.