Dayton, Ohio ZIP Codes
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Looking for the zip code of Dayton, Ohio USA? You are in the right place. Dayton uses 43 ZIP codes, ranging from 45401 to 45490, and this page lists every single one of them. Whether you need the Dayton zip code for a package, a form, or a move, the complete, up-to-date list is right below.
There is no single zip code for Dayton — each neighborhood and delivery area has its own. Dayton is located primarily in Montgomery County, Ohio, and its ZIP codes cover downtown, residential neighborhoods, business districts, and post office boxes across the city. Find your exact code by address using the free tools on this page.
Complete List of Dayton ZIP Codes
All 43 dayton zip codes, sorted from lowest to highest (45401 to 45490):
About Dayton ZIP Codes
The Dayton, Ohio zip code system covers 43 unique ZIP codes spanning 45401 to 45490. The Postal Service assigns each code to a specific delivery area, so two streets only a few blocks apart can carry different ZIP codes.
Most of Dayton sits in Montgomery County, though parts of the city reach into Greene. That is one reason ZIP codes here do not stop at the city limit — a Dayton mailing address can sit in a neighboring county and still carry a Dayton ZIP code.
Mailing to Dayton? 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 Dayton address with our free Address Verification tool, and find the full 9-digit code with the ZIP+4 Lookup.
How to Find Your Dayton ZIP Code
Enter a Dayton street address to get its exact 5-digit ZIP code instantly.
Look up Dayton, Ohio to see the full list of ZIP codes used across the city.
Explore ZIP codes for every covered city in Ohio on the state page.
Frequently Asked Questions
How many ZIP codes does Dayton have?
Dayton has 43 ZIP codes, ranging from 45401 to 45490. The complete list is on this page.
What is the ZIP code of Dayton, Ohio?
There is no single ZIP code for Dayton — the city uses 43 ZIP codes (45401 to 45490). Enter your street address in our ZIP Code by Address tool to find your exact one.
What county is Dayton, Ohio in?
Dayton is primarily in Montgomery County, Ohio, and also extends into Greene.
What is the ZIP code range for Dayton?
ZIP codes in Dayton start at 45401 and go up to 45490. 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 Dayton have 43 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 Dayton 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 Dayton?
Use our free ZIP+4 Lookup tool — enter your Dayton street address to get the full 9-digit code.
More Cities in Ohio
ZIP codes for other cities in Ohio:
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Find the ZIP code for any Dayton street address.
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