ZIP Code 78664 Map
Census ZIP Code Tabulation Area 78664 in Round Rock, TX (Williamson County). ZCTA boundaries closely approximate USPS delivery areas.
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ZIP 78664 Demographics
Source: U.S. Census Bureau, American Community Survey 2020-2024 5-year estimates.
Population
62,060
Households
23,484
Median household income
$87,417
Median age
35.1 years
Median home value
$358,200
Median gross rent
$1,692/mo
Owner-occupied homes
53.7%
Bachelor's degree or higher
36.4%
Below poverty level
10.2%
Land area
16.6 sq mi
Population density
3,736 / sq mi