🇺🇸 United States · Texas
Round Rock ZIP codes
Round Rock, Texas, has 6 ZIP codes, from 78664 to 78683. Which one applies depends on the street address.
- ZIP Codes
- 6
- Population
- 115,997
- State
- Texas
- Coordinates
- 30.5083, -97.6789
All Round Rock ZIP codes
786647866578680786817868278683
No code matches.
Data: GeoNames (CC BY 4.0) and zipcodestack.
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Frequently asked questions
What is the zip code of Round Rock?
Round Rock has 6 ZIP codes in Texas. The right code depends on the street address; the list on this page shows all of them, starting with 78664.
How many ZIP codes does Round Rock have?
Our data lists 6 ZIP codes for Round Rock, United States.
How do I find the exact zip code for an address in Round Rock?
Use the official postal service lookup or a geocoding API with the full street address. For software, the zipcodestack API returns city, region and coordinates for any zip code and can search codes by city or by radius.
Postal code API
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/v1/code/city documentation ZIP code API All documentation
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GET https://api.zipcodestack.com/v1/code/city?city=Round+Rock&country=us
{
"query": { "city": "Round Rock", "country": "us" },
"results": ["78664", "…"]
}Free postal code tools
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