United States

78664 post code

Post code details

1 place

Code

Place

Round Rock

Region

Texas

County

Williamson

Coordinates

30.5145, -97.668

Accuracy

4 / 6

Country

United States

Location

OpenStreetMap ↗

30.5145, -97.668© OpenStreetMap

Places under this code

Place	Region	County	Coordinates
Round Rock	Texas	Williamson	30.5145, -97.668

Nearby codes

All →

78644 78645 78646 78648 78650 78651 78652 78653 78654 78655 78656 78657

Same code in other countries

Country	Place	Region
DE Germany	Eschbronn	Baden-Württemberg
UA Ukraine	Черганівка	Ivano-Frankivska

FAQ

Which city is 78664 in?

Round Rock, Texas, United States.

What are the coordinates of 78664?

30.5145, -97.668

Is 78664 used in other countries?

Yes, 2 other countries.

The data is unofficial and has known truncation; verify with the recipient and carrier for critical shipments. See data source & license → · Updated 2026-11-09. Attribution in