How to Write an Address in Finland: Format, Postcodes and Examples

International  |  September 25, 2026  |  2 min read

Addresses in Finland follow their own order and postcode rules. This guide shows how to write one correctly, with real postcode examples and the most common mistakes, whether you are sending mail, building a checkout form or preparing test data.

Address format

Street, house number, stairway letter and apartment, then postcode and town in capitals.

Finland postcode format

Format: 99999

Finnish postcodes have five digits. Helsinki codes start with 00.

More examples

Sending to Finland from abroad

Write the address exactly as it is used locally, then add the country name in capital English letters on the last line.

Tips and common mistakes

• Apartments are written with stairway and number: Koulukatu 5 B 12.
• Write the town in capitals: 00100 HELSINKI.
• Street endings like katu and tie are part of the name.
• Keep leading zeros in postcodes.

Regions of Finland

Finland has 18 regions in our data. The region is rarely required in a postal address, but forms and databases often store it separately.

Test data for Finland

There is no widely reserved fictional phone range here, so the generator leaves phone numbers out. Generated addresses use real towns and postcode areas with invented streets and names, so they are safe for form testing, mockups and documentation.