ZIP Codes and ZIP code maps

ZIP codes are a system of postal codes used by the USPS since 1963. The term ZIP (Zone Improvement Plan), is properly written in capital letters and was chosen to suggest that the mail travels more efficiently, and therefore more quickly, when senders use the code in the postal address. The basic format consists of five decimal numerical digits. An extended ZIP+4 code, introduced in the 1980s, includes the five digits of the ZIP code, a hyphen, and four more digits that determine a more precise location than the ZIP code alone.
The term ZIP code was originally registered as a servicemark (a type of trademark) by the U.S. Postal Service, but its registration has since expired.

ZIP codes by state

• Alabama ZIP code
• Alaska ZIP code
• American Samoa ZIP code
• Arizona ZIP code
• Arkansas ZIP code
• Armed Forces - Americas ZIP code
• Armed Forces - Europe ZIP code
• Armed Forces - Pacific ZIP code
• California ZIP code
• Colorado ZIP code
• Connecticut ZIP code
• Delaware ZIP code
• District of Columbia ZIP code
• Federated States of Micronesia ZIP code
• Florida ZIP code
• Georgia ZIP code
• Guam ZIP code
• Hawaii ZIP code
• Idaho ZIP code
• Illinois ZIP code
• Indiana ZIP code
• Iowa ZIP code

• Kansas ZIP code
• Kentucky ZIP code
• Louisiana ZIP code
• Maine ZIP code
• Marshall Islands ZIP code
• Maryland ZIP code
• Massachusetts ZIP code
• Michigan ZIP code
• Minnesota ZIP code
• Mississippi ZIP code
• Missouri ZIP code
• Montana ZIP code
• Nebraska ZIP code
• Nevada ZIP code
• New Hampshire ZIP code
• New Jersey ZIP code
• New Mexico ZIP code
• New York ZIP code
• North Carolina ZIP code
• North Dakota ZIP code
• Northern Mariana Islands ZIP code

• Ohio ZIP code
• Oklahoma ZIP code
• Oregon ZIP code
• Palau ZIP code
• Pennsylvania ZIP code
• Puerto Rico ZIP code
• Rhode Island ZIP code
• South Carolina ZIP code
• South Dakota ZIP code
• Tennessee ZIP code
• Texas ZIP code
• Utah ZIP code
• Vermont ZIP code
• Virgin Islands ZIP code
• Virginia ZIP code
• Washington ZIP code
• West Virginia ZIP code
• Wisconsin ZIP code
• Wyoming ZIP code