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Frequently Asked Questions
What is my ZIP Code?
Your ZIP Code is the 5-digit code assigned to your mailing address by the United States Postal Service. You can find it on mail you receive, or search by your city and state on this page.
What is ZIP+4?
ZIP+4 adds four extra digits after the standard 5-digit ZIP Code to identify a more specific delivery area, such as a building, floor, or group of mailboxes. The format looks like 90210-1234.
How many ZIP Codes are there in the United States?
There are 41,702 ZIP Codes in the United States, covering 50 states plus Washington, DC, and more than 19,000 cities. ZipsCode.us helps you search them all for free.
Can one city have multiple ZIP Codes?
Yes. Large cities often have many ZIP Codes, one for each neighborhood or delivery area. For example, New York City has hundreds of ZIP Codes, while smaller towns may share a single ZIP Code.