About ZIP Code 78664

ZIP code 78664 is assigned to Round Rock, Williamson County, Texas, United States. It falls in the Central Time (CT) zone. The estimated population of this ZIP code area is 62,060 with a density of 1,442.4 people per square mile.

🔍 Looking for another ZIP code? Browse all US ZIP codes →

Location Details

ZIP Code78664
CityRound Rock
CountyWilliamson County
StateTexas
CountryUnited States
TimezoneCentral Time (CT)
Timezone IDAmerica/Chicago
Latitude30.5046
Longitude-97.6458
ZIP TypeStandard ZIP

Post Office

Address2250 DOUBLE CREEK DR
CityROUND ROCK
StateTX

Nearby ZIP Codes in Texas

Frequently Asked Questions

What city is ZIP code 78664 in?

ZIP code 78664 is in Round Rock, Williamson County, Texas, United States.

What county is ZIP code 78664 in?

ZIP code 78664 is in Williamson County, Texas.

What timezone is ZIP code 78664 in?

ZIP code 78664 is in the Central Time (CT) zone (America/Chicago).

What is the population of ZIP code 78664?

The estimated population of ZIP code 78664 is 62,060 people with a density of 1,442.4 people per square mile.

What state is ZIP code 78664 in?

ZIP code 78664 is in Texas (TX), United States.

📋 Data Source: United States Postal Service (USPS) & US Census Bureau (ZCTA data) · Public domain government data. For official ZIP code information visit tools.usps.com. Data is periodically updated but may not reflect the most recent changes.