About ZIP Codes

ZIP Codes is a free look-up for United States ZIP codes: 40,977 codes with their place, county and state, arranged state by state and county by county. It is made for anyone who has to fill in a US address, check where a ZIP code is, or list the codes of a county.

Where the data comes from

• ZIP code, place name, county and state: the United States postal code file of GeoNames, used under the Creative Commons Attribution 4.0 licence.
• Land area and map point: the 2024 Gazetteer file of ZIP Code Tabulation Areas from the U.S. Census Bureau, a work of the United States government in the public domain. 33,642 of the codes have an area figure; codes for post office boxes or single buildings have none.
• Map links open OpenStreetMap.

What to keep in mind

ZIP codes are made and changed by the United States Postal Service (USPS) for delivering mail. This site is independent and is not connected with USPS. The open data can lag behind: new codes may be missing and a code may serve more towns than the one named here. The data was last checked in November 2026. For mailing, confirm an address with USPS.

Who makes it

This site is part of ShareYourGroup, a family of free sites about the things people share, send and do together. It is free to use and needs no login. Advertisements pay for the hosting and the work.

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