Find a City by ZIP code.
78681 ZIP Code Detail Information
78681 ZIP code is designated for Round Rock in Williamson of Texas. More information on this ZIP code is available below. If you came here after performing a reverse phone lookup, these details are provided to give you a general idea of the phone number's location.
78681 ZIP Code - Map, City, County, State, and Location
| City: | Round Rock |
| County: | Williamson |
| State: | Texas (TX) |
| Latitude: | 30.5084 |
| Longitude: | -97.7062 |
If you are trying identify a ZIP code for any specific address, you can use USPS' lookup service. You could also use our free ZIP Code Lookup app to identify ZIP code for any location in the United States.