Find zip code by city address

ZIP codes don't usually cross state lines, but some do , , and are good examples. The edges of the boundaries commonly overlap. For the purposes of our free zip code database by county downloads, we will commonly list either the most common region for the ZIP code or list multiple regions if several exist in the ZIP code. For cities, the assignment is somewhat more complicated. The assignment of cities to ZIP codes is more general. The city is usually the name of the main post office. For instance, almost all ZIP codes in St.

Louis County in Missouri have a city of Saint Louis when they may be more accurately described as the name of a smaller city where they are located. Click here to learn more about matching ZIPs to cities and counties. Toggle navigation. Search by ZIP, address, city, or county:.

Featured In. Remote and especially rural areas of the country do not have enough deliverable addresses to create a mail route. Conversely, a single address will only ever be located in one county.

So, for the most precise results, use the full address to find county information rather than the city or ZIP Code. Step 1. Go to the website of an address validation services provider of your choice. In this example, we'll find a ZIP Code's corresponding county designation using the Smarty formerly SmartyStreets address validation demo.

Step 2. Step 3. Step 5. In the "Output Fields" section of the results, look for "County Name". Postal codes vary from one country to another but they are usually a group of numbers between 3 and 10 digits long.

In some countries such as the United Kingdom and Canada, postal code are comprised of number and letters. Toggle navigation Map Developers. Home Maps What county am I in? Where am I? What is my zipcode? For example ZIP Codes that start with are assigned to the Navy, and therefore have no geographic location.

Similarly, areas without regular postal routes rural route areas or areas with no mail delivery undeveloped areas , are not assigned ZIP Codes. They are based on sparse delivery routes, so the boundary between ZIP Code areas there is indefinite. You can see our instructions on how to find a county by ZIP Code.

The full ZIP Code identifies a small delivery segment such as a street, a city block, a group of apartments, or even an individual address that receives a high volume of mail. Even though the USPS might not provide accurate geocodes for those addresses, Smarty can still provide roof-top level geocodes for most addresses in the US.