US ZIP Code Regex Pattern

Match and validate US ZIP codes in 5-digit and ZIP+4 formats using regex. Ready-to-use patterns for address validation.

The Pattern

/\b\d{5}(?:-\d{4})?\b/g

How It Works

Token	Meaning
`\b`	Word boundary to prevent partial matches
`\d{5}`	Exactly 5 digits (standard ZIP code)
`(?:-\d{4})?`	Optional ZIP+4 extension: dash followed by 4 digits
`\b`	Trailing word boundary

Test Cases

✅90210Match

✅10001Match

✅90210-1234Match

✅00501Match

❌1234No match

❌123456No match

❌ABCDENo match

Code Examples

javascript

const zipRegex = /\b\d{5}(?:-\d{4})?\b/g;
const text = "Ship to 90210 or 10001-5432 for delivery.";
const matches = text.match(zipRegex);
console.log(matches); // ["90210", "10001-5432"]

python

import re
zip_regex = r'\b\d{5}(?:-\d{4})?\b'
text = "Ship to 90210 or 10001-5432 for delivery."
matches = re.findall(zip_regex, text)
print(matches)  # ['90210', '10001-5432']

Common Use Cases

Address forms - validate ZIP code input
Shipping calculators - extract ZIP codes for rate lookup
Data cleaning - normalize ZIP code formats in datasets
Geolocation - extract ZIP codes from text for location mapping

Related Patterns

Phone Number Credit Card Number IPv4 Address

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