Czechia

About Czechia codes

Need Czechia (CZ) for a checkout form, shipping zone, or backend validation? This page summarizes the ISO 3166-1 country codes and official subdivisions developers use with CountriesDB.

This guide lists 90 official ISO 3166-2 subdivisions for Czechia. These are the same codes CountriesDB serves through widgets and the Backend Data API.

For production, use the CountriesDB country/subdivision widget or fetch Czechia from the Data API and validate codes server-side instead of copying values from this page.

ISO codes

• Alpha-2CZ
• Alpha-3CZE
• Numeric203
• Independenttrue
• StatusOfficially assigned

Official subdivisions (90)

Official ISO 3166-2 codes for Czechia. Use these values in region/state selects and server-side validation, not informal or marketing region names.

Frequently asked questions

What is the ISO 3166-1 code for Czechia?

Czechia uses ISO 3166-1 alpha-2 CZ, alpha-3 CZE, and numeric 203. These codes show up in forms, shipping, banking, and APIs.

How many official ISO 3166-2 subdivisions does Czechia have?

CountriesDB lists 90 official ISO 3166-2 subdivisions for Czechia (states, provinces, regions, or equivalent). Use them when you validate region selects and shipping zones.

How do I use Czechia country and subdivision data in a form?

Use the CountriesDB widget or Data API to fill country and subdivision selects for Czechia, then validate submitted codes with the Validation API so alpha-2 and ISO 3166-2 values stay consistent.

Use Czechia in your app

Add CountriesDB country and subdivision selects with the widget docs, or call the Backend Data API for Czechia (CZ) and validate submissions with the Validation API. Guides stay in sync with the same dataset your project keys already use. widget docs.