About ZIP Codes Box
ZIP Codes Box is a free reference for all 41,749 US ZIP codes: the city, county, time zone and area codes for each ZIP code, the people who live there, every ZIP code in a city or county, and tools to find ZIP codes near you or within a radius.
Where the data comes from
- ZIP codes, cities and ZIP types: the U.S. Postal Service’s ZIP code lists, as compiled in the open zipcodes dataset (MIT license), which also draws on unitedstateszipcodes.org.
- ZIP code locations: GeoNames (CC BY 4.0). Each ZIP code is placed at one center point, which is what distances are measured from.
- Population, income and housing: U.S. Census Bureau, American Community Survey 5-year estimates (2020–2024), by ZIP Code Tabulation Area. Land and water area: Census Gazetteer files.
- Area codes: the same dataset, linked to our sister site Area Code Box.
ZIP codes are delivery routes, not fixed boundaries, and USPS changes them from time to time. The data was last updated on 2026-10-28. For anything important, confirm an address with USPS.
Spotted a mistake? Let us know.
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