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RegEx library
Email regex Java
Phone number regex Java
IP address regex Java
Date regex Java
URL regex Java
Numbers only regex (digits only) Java
UUID regex Java
Regex match words Java
ZIP code regex Java
GUID regex Java
Password regex Java
HTML regex Java
SSN regex Java
XML regex Java
Mac address regex Java
Street address regex Java

ZIP code regex Java

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.

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JavaScript
Python
Java
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ZIP code regex

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

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

True

False

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Example code in Java:

import java.util.regex.Pattern;
import java.util.regex.MatchResult;
import java.util.Arrays;

public class Main {

    public static void main(String []args) {
        // Validate ZIP code
        boolean isMatch = Pattern.compile("^[0-9]{5}(?:-[0-9]{4})?$")
               .matcher("80001")
               .find(); 
        System.out.println(isMatch); // prints true
        
        // Extract ZIP code from a string
        String[] matches = Pattern.compile("[0-9]{5}(?:-[0-9]{4})?")
                          .matcher("My zip code is 80001")
                          .results()
                          .map(MatchResult::group)
                          .toArray(String[]::new);
        System.out.println(Arrays.toString(matches)); // prints [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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