USPS Standard Delivery Code Williamson County →

78665 ZIP Code: Round Rock, Texas

Official postal information, geographic coordinates, USPS post office locations, and US Census Bureau demographic metrics for ZIP code 78665 in Round Rock, TX.

Neighborhoods:

Postal & Geographic Specifications USPS Data

ZIP Code 78665

Primary City Round Rock, TX

County Williamson County

Area Code(s) 512

Timezone America/Chicago

Land Area 18.75 sq mi

Elevation 0 ft

Coordinates 30.5400°, -97.6400°

Demographic & Economic Profile (US Census Bureau)

American Community Survey (ACS) 5-Year Verified Metrics

+64% vs Texas Avg

Total Population 61,577 1,919 people / sq mi

Median Household Income $122,680 Per Capita: $42,953

Median Home Value $474,100 Median Rent: $1,200/mo

Housing Tenancy

60% Own • 40% Rent

25,598 Total Units

Median Household Income Comparison $122,680 (78665) vs. $74,640 (Texas State)

Metrics sourced directly from the official U.S. Census Bureau (2022 ACS 5-Year Estimates).

Verify on data.census.gov

Editor's Neighborhood Insight & Local Context

Data for ZIP code 78665 in Round Rock, Texas.

USPS Postal Services

Active Route

The primary postal delivery jurisdiction for 78665 operates within Round Rock, Texas.

Note: Not all ZIP codes have a dedicated physical post office. A single USPS regional facility often serves multiple ZIP codes across a city or county.

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