Round Rock zipcode
| City | Round Rock |
| ZIP Code | 78681 |
| Type | Standard |
| State Code | TX |
| State | Texas |
ZIP code of Round Rock is 78681. This place is located in Texas state in US. To send any postal service to Round Rock, you must use 78681 zipcode.
The ZIP code 78681 is also used with 1 more city name of Texas.
- Austin, TX