78680 ZIP Code — Round Rock, TX
Williamson County, Texas
ZIP code 78680 is located in Round Rock, Texas, within Williamson County. It covers approximately 0.00 square miles and serves a population of 0 residents. This is a standard ZIP code in the Central (CT) timezone, served by area code 512/737.
0
population
0.00
sq mi land
Standard
ZIP type
Central (CT)
timezone
78680 ZIP code map
Cities in ZIP code 78680
Below are the cities the US Postal Service accepts for ZIP code 78680. Using any city not on this list may result in mail delivery delays.
| City | Status |
|---|---|
| Round Rock | Acceptable |
Demographics
updated 05/2026
| Population | |
|---|---|
| Total population | 0 |
| Population density | 0 / sq mi |
| State FIPS | 48 |
| County FIPS | 491 |
| Geography | |
|---|---|
| Land area | 0.00 sq mi |
| Water area | 0.00 sq mi |
| Latitude | 30.5082 |
| Longitude | -97.6789 |
| Timezone | Central (CT) |
| Area code | 512/737 |