USPS ZIP Code Boundaries: Quarterly Updates and GeoJSON Data for Mapping and Analytics
Summary
USPS ZIP Code Boundaries provides a national ZIP Code boundary map built on USPS delivery address and location data, with quarterly updates for internal, enterprise, and publication use. The resource includes GeoJSON samples, data files, and API access through related USPS services, making it valuable for mapping, demographic display, routing, and data governance. The page also links to technical guides, licensing, and upgrade info for organizations needing accurate boundary data.