Poland Postal Code Format Guide
Polish postal codes contain five digits split 2-3 by a hyphen. The code is written before the locality, and the hyphen is part of the normal presentation.
Standard format
NN-NNN
Example
00-001
Implementation and validation notes
Polish postal codes contain five digits split 2-3 by a hyphen. The code is written before the locality, and the hyphen is part of the normal presentation.
Validate required state, character set, length, and syntax on the client, then repeat validation on the server. Preserve the original input and normalize into a separate field; never truncate local scripts, compound names, or leading zeroes to fit a single Western assumption.
This guide describes common formats rather than an official registry and cannot enumerate every exception. Generated output is for testing only, not delivery, calling, identity verification, or real account activity.
Related resources
Frequently asked questions
What is the standard Poland postal code format?
A common representation is NN-NNN, for example 00-001. Polish postal codes contain five digits split 2-3 by a hyphen. The code is written before the locality, and the hyphen is part of the normal presentation.
How should Poland postal code test data be stored?
Store the original value as a string so leading zeroes, spaces, hyphens, accents, and local scripts are preserved. Use a separate normalized field for search.
Does correct formatting prove the data is real?
No. Syntax validation cannot prove an address is deliverable, a number is assigned, or a name belongs to a real person.