What County Is 78664 In?

ZIP 78664 is located in

Williamson County

Round Rock, Texas (TX)

30.51°N, 97.65°W · FIPS 48491

Williamson County — ZIP 78664

ZIP 78664 highlighted in Williamson County, Texas. Click neighboring ZIPs to explore.

ZIP Code Details

ZIP Code78664
CountyWilliamson County
CityRound Rock
StateTexas (TX)
FIPS Code48491

Look Up Another ZIP Code

Nearby ZIP Codes

78661 Prairie Lea, TX Caldwell County 78662 Red Rock, TX Bastrop County 78663 Round Mountain, TX Blanco County 78665 , TX Williamson County 78666 San Marcos, TX Hays County 78667 , TX Hays County

Frequently Asked Questions

What county is ZIP code 78664 in?

ZIP code 78664 is located in Williamson County, Texas (TX).

What city is ZIP code 78664 in?

ZIP code 78664 is primarily associated with Round Rock, Texas.

What state is ZIP code 78664 in?

ZIP code 78664 is in the state of Texas (TX).