Regex for US ZIP Code

Validates US ZIP codes in 5-digit or ZIP+4 format.

Pattern

/^\d{5}(-\d{4})?$/

Live Tester

Enter a string to test

Examples

✓ 10001

✓ 90210

✓ 12345-6789

✗ 1234

✗ 123456

✗ ABCDE

Pattern Breakdown

^\d{5} — five digits

(-\d{4})?$ — optional dash + four more digits

Code Snippets

Javascript

const regex = /^\d{5}(-\d{4})?$/;
regex.test("90210"); // true

Python

import re
pattern = r"^\d{5}(-\d{4})?$"
bool(re.match(pattern, "90210"))  # True

Php

$pattern = '/^\d{5}(-\d{4})?$/';
preg_match($pattern, "90210"); // 1

Related Patterns

Email Address /^[a-zA-Z0-9._%+-]+@[a-zA-Z0-9.-]+\.[a-zA-Z]{2,}$/ URL /^https?:\/\/(www\.)?[a-zA-Z0-9@:%._+~#=]{1,256}\.[a-zA-Z0-9()]{1,6}\b([a-zA-Z0-9()@:%_+.~#?&/=-]*)$/ Phone Number (International) /^\+?[1-9]\d{1,14}$/ Phone Number (US) /^$?[2-9]\d{2}$?[-.\s]?\d{3}[-.\s]?\d{4}$/ Phone Number (EU) /^\+?[1-9][0-9]{0,3}[\s.-]?$?[0-9]{1,5}$?[\s.-]?[0-9]{1,5}[\s.-]?[0-9]{1,5}$/ IPv4 Address /^((25[0-5]|2[0-4]\d|[01]?\d\d?)\.){3}(25[0-5]|2[0-4]\d|[01]?\d\d?)$/

Frequently Asked Questions

What is the regex for US ZIP Code?▾

The regex pattern for US ZIP Code is /^\d{5}(-\d{4})?$/. Validates US ZIP codes in 5-digit or ZIP+4 format.

How do I use the US ZIP Code regex in JavaScript?▾

In JavaScript you create the pattern with a regex literal or the RegExp constructor and call .test() to check a string against it. A ready-to-copy example is shown in the Code Snippets section above, alongside Python and PHP versions.

What does the US ZIP Code pattern match?▾

It matches strings like 10001; it rejects strings like 1234. See the Examples section above for the full list of matching and non-matching cases.