Austin, Texas ZIP Codes
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What is the zip code for Austin, Texas? The honest answer is that Austin does not have just one — it has 74 ZIP codes, from 73301 to 78799. This page gives you the complete list of Austin ZIP codes, plus free tools to find the exact code for any street address in the city.
Austin sits primarily in Travis County, Texas. Its ZIP codes are assigned by the U.S. Postal Service to delivery areas across the city — homes, businesses, government offices, and PO boxes. Scroll down for the full list, or jump straight to your address with the ZIP code by address lookup.
Complete List of Austin ZIP Codes
All 74 austin zip codes, sorted from lowest to highest (73301 to 78799):
About Austin ZIP Codes
ZIP codes in Austin, Texas run from 73301 to 78799 — 74 codes in total. Each one maps to a USPS delivery area, which is why the correct code depends on the exact street address, not just the city name.
Most of Austin sits in Travis County, though parts of the city reach into Williamson. That is one reason ZIP codes here do not stop at the city limit — a Austin mailing address can sit in a neighboring county and still carry a Austin ZIP code.
Mailing to Austin? Using the correct ZIP code — and the ZIP+4 add-on where it matters — keeps letters and packages moving without delays or returns. Before you send, you can confirm any Austin address with our free Address Verification tool, and find the full 9-digit code with the ZIP+4 Lookup.
How to Find Your Austin ZIP Code
Enter a Austin street address to get its exact 5-digit ZIP code instantly.
Look up Austin, Texas to see the full list of ZIP codes used across the city.
Explore ZIP codes for every covered city in Texas on the state page.
Frequently Asked Questions
How many ZIP codes does Austin have?
Austin has 74 ZIP codes, ranging from 73301 to 78799. The complete list is on this page.
What is the ZIP code of Austin, Texas?
There is no single ZIP code for Austin — the city uses 74 ZIP codes (73301 to 78799). Enter your street address in our ZIP Code by Address tool to find your exact one.
What county is Austin, Texas in?
Austin is primarily in Travis County, Texas, and also extends into Williamson.
What is the ZIP code range for Austin?
ZIP codes in Austin start at 73301 and go up to 78799. Codes are assigned by delivery area, so the lowest codes generally sit closest to the city center and rise as you move outward.
Why does Austin have 74 different ZIP codes?
The Postal Service creates a new ZIP code whenever a delivery area grows too large for one code to handle efficiently. A city the size of Austin has many delivery routes — neighborhoods, business districts, and high-volume mailers each need their own code so mail can be sorted and delivered accurately.
How do I find my ZIP+4 code in Austin?
Use our free ZIP+4 Lookup tool — enter your Austin street address to get the full 9-digit code.
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Find the ZIP code for any Austin street address.
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