Regex for French postal code
5-digit French postal code.
The French postal code regex is ^\d{5}$ — copy it below, or open it in the explainer for a token-by-token breakdown.
The pattern
What it matches
75001130016910006000
What it doesn't match
7500750001PARISABCDE
Notes & gotchas
French postal codes are 5 digits. First 2 digits are the département number (75=Paris, 13=Bouches-du-Rhône, 69=Rhône). The remaining 3 indicate the area within. Same format used in Monaco.
Code in your language
Use the explainer's Code tab to generate ready-to-paste snippets in JavaScript, Python, Java, .NET, Go, Ruby, and PHP for this pattern.
Open in explainer →Token-by-token breakdown
Every part of the pattern, left to right:
| Token | Meaning |
|---|---|
^ | start of string (or line in multiline mode) |
\d{5} | exactly 5 times: digit (0–9) |
$ | end of string (or line in multiline mode) |
About this pattern
European Union identifiers follow standards set by individual member states with EU-wide coordination (VAT VIES, IBAN/SEPA, etc.). The regex validates structure; for production use, validate via the appropriate registry.
Quick usage in different languages
This exact pattern — with the correct escaping and idioms for each language:
- JavaScript:
/^\d{5}$/.test(value) - Python:
re.match(r"^\d{5}$", value) - Java:
Pattern.compile("^\\d{5}$").matcher(value).matches() - C# / .NET:
Regex.IsMatch(value, @"^\d{5}$") - Go:
regexp.MustCompile(`^\d{5}$`).MatchString(value) - Ruby:
/^\d{5}$/.match?(value) - PHP:
preg_match('~^\d{5}$~', $value)
The explainer’s Code tab regenerates these for any pattern you paste, and the downloadable cheat sheet bundles the breakdown, all seven snippets, and the pitfalls below onto one printable page.
Common pitfalls
- Anchored to the whole string. This pattern uses ^ and $, so it requires the entire input to match. To find it inside a longer text, drop the anchors and use the global (g) flag.
- Escape it correctly per language. In Java and JavaScript strings each backslash must be doubled (\\d); in Python, Go, and C# use raw/verbatim strings so the backslashes survive.
- Validate beyond format. Matching the format doesn't guarantee the value is real. Confirm the french postal code against a source of truth (database, API, or checksum) where it matters.
Related patterns
More patterns in the Europe 🇪🇺 category:
See also
Browse all 300 patterns in the library, or open this regex in the interactive explainer to see a token-by-token breakdown, test against custom input, and generate code in seven languages.