ZIP Code 78681
Round Rock · Williamson, Texas
78681 is the ZIP code of Round Rock in Williamson, Texas, United States.
- ZIP Code
- 78681
- County
- Williamson
- State
- Texas
- Country
- United States
Place with ZIP code 78681
| Place | County | Location |
|---|---|---|
| Round Rock | Williamson | 30.508, -97.679 |
Near Austin
The nearest major city is Austin, about 28 km away.
Nearby ZIP codes
Frequently asked questions
Which places use ZIP code 78681?
Round Rock.
Which county and state is 78681 in?
Williamson, Texas, United States.
What is the nearest major city to 78681?
Austin, about 28 km away.
Source: GeoNames postal codes (CC BY 4.0), geonames.org, retrieved 2026-10-22. Place coordinates are approximate. Check with the national postal service before sending anything valuable.