US ZIP code finder
Search by city name to find its ZIP code, or enter a ZIP code to find the city and state. Covers all major US cities.
Files are processed in your browser and never uploaded.
How to use US ZIP code finder
Type your search
Enter what you are looking for in the search box. Matches appear as you type.
Choose the direction
Switch between City → ZIP and ZIP → City to search either way round.
Read the answer
Results are looked up from data already loaded with the page, so there is no waiting and no request to a server.
What this tool does
City to ZIP, or ZIP to city
Type a city to get its ZIP codes, or a ZIP to get the city and state, with the toggle deciding which way round you are working.
Covers all major US cities and postal codes
All major US cities and their postal codes are included, which covers what a delivery address or an online form will ask for.
Results as you type
The list narrows with every keystroke rather than waiting for a search button, so a lookup takes a second.
Runs fully in your browser with no upload and no sign-up
The whole table is held in the page, so nothing you type is uploaded and it works with no connection.
Frequently asked questions
What is a ZIP code?
ZIP stands for Zone Improvement Plan. The five-digit code was introduced by the United States Postal Service in 1963 to make mail sorting faster and more efficient. The first digit represents a broad geographic area, and the remaining digits narrow it down to a specific post office or delivery area.
Why does a city have more than one ZIP code?
Large cities are divided into multiple delivery zones, each with its own ZIP code. New York City, for example, has hundreds. This tool shows the most well-known ZIP(s) for each city.
What is a ZIP+4 code?
The extended ZIP+4 format adds a hyphen and four more digits to narrow down to a specific block or building. This tool uses the standard 5-digit ZIP codes only.
Is my data uploaded anywhere?
No. The ZIP code database is built into this page and everything runs offline in your browser. Nothing is sent to a server.
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