Number of ZIP Codes - U.S. Postal Facts

Postal Facts - U.S. Postal Service

Postal Facts - United States Postal Service

USPS

41,554

ZIP Codes

There are 41,554 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 | May 15, 2026

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®.

Postal Facts 2024 provides the public with information about the U.S. Postal Service. The facts in this publication may be reproduced for the purpose of stating the fact itself, in a business, informational or academic context and the like, and in the body of text discussing factual subject matter relevant to the fact being presented. However, these facts may become outdated after publication and seeking the latest information is advised.

Produced by U.S. Postal Service Corporate Communications

facts.usps.com

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