ZIP code regex

ZIP code (US postal code) regular expression can be used to verify if a given string contains a valid ZIP code or extract ZIP code from a string. Supports both 5-digit and 9-digit (ZIP+4) formats.

ZIP code regex

A regular expression to test a string against ZIP code format:

/^[0-9]{5}(?:-[0-9]{4})?$/

Test it!

/^[0-9]{5}(?:-[0-9]{4})?$/

True

False

Enter a text in the input above to see the result

Example code in Javascript:

var zipRegex = /^[0-9]{5}(?:-[0-9]{4})?$/;
// Validate zip code
zipRegex.test('80001'); // Returns true
zipRegex.test('80001-2222'); // Returns true
zipRegex.test('800010'); // Returns false

// Extract zip code from a string
var zipRegexG = /[0-9]{5}(?:-[0-9]{4})?/g;
'My zip code is 80001'.match(zipRegexG); // returns ['80001']

Test it!

True

False

Enter a text in the input above to see the result

Test it!

True

False

Enter a text in the input above to see the result

Notes on ZIP code validation and extraction

This ZIP code regex has several limitations:

It only works for US ZIP codes. If you need to support other countries, you might need to have a separate regular expression for each one of them and execute it based on the country provided.
It can not guarantee that ZIP code actually exists. For instance, 99999 is a correct format, but this ZIP code does not exist.
The extraction method can generate false-positive extraction if a string contains multiple numbers.

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