ZIP Code 78665 Map
Census ZIP Code Tabulation Area 78665 in Round Rock, TX (Williamson County). ZCTA boundaries closely approximate USPS delivery areas.
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ZIP 78665 Demographics
Source: U.S. Census Bureau, American Community Survey 2020-2024 5-year estimates.
Population
66,171
Households
24,162
Median household income
$122,680
Median age
35.5 years
Median home value
$474,100
Median gross rent
$1,938/mo
Owner-occupied homes
61.4%
Bachelor's degree or higher
53.6%
Below poverty level
4.7%
Land area
24.1 sq mi
Population density
2,748 / sq mi