41,552 ZIP Codes - U.S. Postal Facts

Postal Facts - U.S. Postal Service

Postal Facts - United States Postal Service

USPS

41,552

ZIP Codes

There are 41,552 ZIP Codes in the country. They range from 00501, belonging to the Internal Revenue Service in Holtsville, NY, to 99950 in Ketchikan, AK. The easiest ZIP Code to remember? How about 12345, a unique ZIP Code for General Electric in Schenectady, NY.

* | Tags: Fun facts USPS Fact #306 | July 1, 2025

Quick! What’s that ZIP Code?

The Zoning Improvement Plan (ZIP) Code was launched in 1963 to better process and deliver increasing volumes of U.S. Mail. The first number in the five-digit ZIP Code represents a general geographic area of the nation, “0” in the east, moving
to “9” in the west. The next two numbers represent regional areas, and the final two identify specific Post Offices. In 1983, the ZIP+4 Code was introduced.

Trademarks

The Sonic Eagle Logo, the trade dress of USPS packaging, the Letter Carrier Uniform and the Postal Truck and the following marks are among the many trademarks owned by the United States Postal Service: Click-N-Ship®, Deliver The Win®, EDDM®, ePostage®, Every Door Direct Mail®, Express Mail®, First-Class™, First-Class Mail®, First-Class Package International Service®, Forever®, Global Express Guaranteed®, IMb®, Informed Delivery®, Intelligent Mail®, Label Broker™, Parcel Select®, P.O. Box™, Post Office®, Pony Express®, Postal Inspection Service™, PostalOne!®, Postal Police®, #PostalProud®, Priority Mail Express International®, Priority Mail Flat Rate®, Priority Mail International®, Priority: You®, Registered Mail™, Standard Mail®, The Postal Store®, United States Postal Inspection Service®, United States Postal Service®, U.S. Mail®, U.S. Postal Inspector™, U.S. Postal Service®, USPS®, USPS BlueEarth®, USPS Mobile®, USPS Operation Santa®, USPS Tracking®, usps.com®, We are people delivering to people™, ZIP+4® and ZIP Code™. This is not a comprehensive list of all Postal Service trademarks.

Non-Postal Trademarks

Dollar General®, Forest Stewardship Council®, How2Recycle®, McDonald’s®, National Dog Bite Prevention Week®, Starbucks®, Subway®, Sustainable Forestry Initiative®, The Climate Registry®.

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Trademarks

Non-Postal Trademarks

Dollar General®, Forest Stewardship Council®, How2Recycle®, McDonald’s®, National Dog Bite Prevention Week®, Starbucks®, Subway®, Sustainable Forestry Initiative®, The Climate Registry®.

Produced by U.S. Postal Service Corporate Communications

facts.usps.com