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US ZIP codes are a type of postal code used within the United States to help the United States Postal Service (USPS) route mail more efficiently. Some still refer to ZIP codes as US postal codes. The term ZIP stands for Zone Improvement Plan.
Cities by ZIP Code™ For more rapid delivery, please use the recommended or recognized city names whenever possible for this ZIP Code ™.
Zip codes directory by state. State Zip Codes. Click below for zip codes in that state!
Postal Code Search Notes. Not having the right zip code for your postal mail would mean your letters will not reach their destination. Click the location on the map to find your needed postal code or choose the state in the links above for a list of the zip codes available for each of the US states.
In addition to the fifty states and D.C., the United States also holds several overseas territories. The populated ones have their own postal codes, but only the two most populous (Puerto Rico and Guam) have abbreviations. Some former territories still maintain postal codes, as they are considered free associates of the United States.
A ZIP Code is a 5-digit code that identifies a specific geographic delivery area. ZIP Codes can represent an area within a state (an area that may or may not cross county boundaries), an area that crosses state boundaries (an unusual condition), or a single building or company that has a very high mail volume.
A ZIP Code is a postal code used by the United States Postal Service (USPS) in a system it introduced in 1963. The term ZIP is an acronym for Zone Improvement Plan ;  it was chosen to suggest that the mail travels more efficiently and quickly ( zipping along ) when senders use the code in the postal address .
Our free ZIP codes finder helps you find the ZIP codes and related demographic information for any U.S. or Canadian Postal Code OM. ZIP Code & Postal Code Facts. Zip Codes are largely responsible for the automation of the United States Post Office’s mail handling. Today, over 600,000,000 pieces of mail are delivered each business day, and our ...
Publication 100 - The United States Postal Service - An American History 1775 - 2006 > The history of the United States PostalService > The20th Century > ZIP Code During World War II, thousands of experienced postal employees left to serve with the military.