Round Rock is one of the fastest-growing cities in Central Texas and a key part of the Greater Austin metropolitan area. Known for its strong economy, excellent schools, technology employers, and family-friendly communities, Round Rock attracts residents and businesses from across the state. If you’re searching for ZIP codes in Round Rock, Texas, it’s important to know that the city uses several ZIP codes covering residential neighborhoods, commercial districts, and expanding suburban developments.
Whether you’re moving to Round Rock, mailing a package, shopping online, or verifying an address, knowing the correct ZIP code helps ensure accurate delivery and location identification.
Round Rock Texas ZIP Codes
| ZIP Code | Area / Neighborhood |
| 78664 | Central Round Rock |
| 78665 | East & Northeast Round Rock |
| 78680 | Round Rock PO Boxes |
| 78681 | West Round Rock |
| 78682 | Round Rock Postal Services |
| 78683 | Round Rock Business & Postal Services |
Areas Covered by Round Rock ZIP Codes
| ZIP Code | Coverage Area |
| 78664 | Downtown Round Rock |
| 78664 | Central Residential Communities |
| 78665 | East Round Rock |
| 78665 | New Residential Developments |
| 78681 | West Round Rock |
| 78681 | Brushy Creek Area |
| 78681 | Established Family Neighborhoods |
Nearby ZIP Codes
| ZIP Code | Area |
| 78613 | Cedar Park |
| 78626 | Georgetown |
| 78628 | Georgetown |
| 78634 | Hutto |
| 78641 | Leander |
| 78660 | Pflugerville |
| 78664 | Round Rock |
| 78665 | Round Rock |
| 78681 | Round Rock |
| 78717 | Austin Border Area |
Round Rock ZIP Code Range
Most Round Rock ZIP codes fall between 78664 and 78681, covering downtown districts, residential neighborhoods, business corridors, and growing suburban communities throughout the city.
How to Find the Right Round Rock ZIP Code
Because Round Rock continues to expand, the correct ZIP code depends on the exact address.
- Check the complete street address before selecting a ZIP code.
- Use the USPS ZIP Code Lookup tool for official ZIP code verification.
- Review utility bills, lease agreements, or official mail.
- Search online maps to verify ZIP code boundaries.
- Confirm ZIP codes before mailing packages to avoid delivery delays.
Popular Round Rock ZIP Codes
Some of the most searched ZIP codes in Round Rock include:
- 78664 – Central & Downtown Round Rock
- 78665 – East Round Rock
- 78681 – West Round Rock
- 78660 – Nearby Pflugerville
- 78626 – Georgetown
- 78613 – Cedar Park
Frequently Asked Questions
Q: What is the main ZIP code for Round Rock Texas?
A: The most commonly used Round Rock ZIP codes are 78664, 78665, and 78681.
Q: What ZIP code is Downtown Round Rock?
A: Downtown Round Rock is primarily located within 78664.
Q: Does Round Rock have multiple ZIP codes?
A: Yes. Round Rock uses several ZIP codes, including 78664, 78665, and 78681, along with postal-service ZIP codes.
Q: What county is Round Rock in?
A: Round Rock is primarily located in Williamson County, Texas, with a small portion extending into Travis County.
Final Thoughts
Round Rock, Texas, uses multiple ZIP codes to serve its growing population, thriving business districts, and expanding residential communities. From Downtown Round Rock (78664) and East Round Rock (78665) to West Round Rock (78681), each area has its own postal code. Always verify the exact ZIP code for your address to ensure accurate mail delivery and location identification.
