Description: <div>U.S. ZIP Code Boundaries represents five-digit ZIP Code areas used by the U.S. Postal Service to deliver mail more effectively. The first digit of a five-digit ZIP Code divides the United States into 10 large groups of states (or equivalent areas) numbered from 0 in the Northeast to 9 in the far West. Within these areas, each state is divided into an average of 10 smaller geographical areas, identified by the second and third digits. These digits, in conjunction with the first digit, represent a Sectional Center Facility (SCF) or a mail processing facility area. The fourth and fifth digits identify a post office, station, branch or local delivery area.</div><div><br /></div>This layer is updated annually. The boundaries are sourced from <a href="https://www.tomtom.com/" target="_blank">TomTom</a> (March 2023) and the population estimates are from <a href="https://www.esri.com/" target="_blank">Esri</a> Demographics.
Copyright Text: Sources: Esri; TomTom North America, Inc.; United States Postal Service