Round Rock, TX ZIP Codes, Coordinates & Counties
Round Rock, Texas has 3 ZIP codes in Williamson county. The approximate center of Round Rock is 30.528, -97.672. Round Rock has about 408,610 known street addresses.
ZIP codes in Round Rock, TX
| ZIP Code | County | Latitude | Longitude |
|---|---|---|---|
| 78664 | Williamson | 30.505 | -97.646 |
| 78665 | Williamson | 30.545 | -97.644 |
| 78681 | Williamson | 30.533 | -97.725 |
Counties Round Rock spans
Williamson
Most common streets in Round Rock
Chapel Hill, A W Grimes, University, Sunrise, Interstate 35, Mays, Taylor, Palm Valley, Louis Henna, Bluffs Landing
Frequently asked questions
What ZIP codes are in Round Rock, TX?
Round Rock, Texas has 3 ZIP codes, ranging from 78664 to 78681. The full list, with each ZIP's county and coordinates, is in the table on this page.
What county is Round Rock, TX in?
Round Rock is in Williamson county.
What are the latitude and longitude of Round Rock, TX?
The approximate center of Round Rock, Texas is latitude 30.528, longitude -97.672. Coordinates for each ZIP code are listed in the table above.
How many ZIP codes does Round Rock, TX have?
Round Rock has 3 ZIP codes.
How many addresses are in Round Rock, TX?
Round Rock, Texas has about 408,610 known street addresses in the sthan.io US address database.
What are the most common streets in Round Rock, TX?
Some of the most common street names in Round Rock are Chapel Hill, A W Grimes, University, Sunrise, Interstate 35, Mays.
What cities are near Round Rock, TX?
Cities near Round Rock include Pflugerville (7 mi), Hutto (8 mi), Cedar Park (9 mi), Georgetown (11 mi), Leander (16 mi).
Cities near Round Rock
Pflugerville, TX (7 mi) Hutto, TX (8 mi) Cedar Park, TX (9 mi) Georgetown, TX (11 mi) Leander, TX (16 mi) Manor, TX (16 mi) Austin, TX (17 mi) Taylor, TX (17 mi)
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View the API →Last updated: June 2026 · Data: sthan.io US address database