How do I Find Someone's Full Address Using Their Partial Address?

By Jon Stefansson

Make sure your letters are delivered by using a complete address.
i stamp image by CraterValley Photo from

Having a friend or family member's address is useful if you plan to send a letter or drop by for a visit, but if you don't have all the information you can find yourself in a bind. But don't despair; as long as you have certain pieces of information you can use the Internet to complete the address. The service is offered by the United States Postal Service and is completely free to use.

Open a new Web browser window and go to the United States Postal Service's "ZIP Code Look-up" website (see Resources).

Type the information from the partial address into the form. The site requires the first line of the address, the city and the state.

Click "Submit." The site will return ZIP code results results based on the information you have provided.

Click "Find All Cities in a ZIP Code" to find out the city a ZIP code applies to if you only have a ZIP code. You can use this information in step 2 to refine your search.