Finland Postal Codes

Finland uses postal codes in the format ##### (# = digit, @ = letter).

3,576 postal codes are recorded for Finland in the open data sources below.

In Finland a postal code is called a postinumero. You will see that term on forms and address labels.

Postal codes by town and city

2,270 places in Finland have a recorded postal code. The 29 largest have their own page; the rest are listed alphabetically.

Largest towns and cities

Helsinki  ·  Espoo  ·  Tampere  ·  Vantaa  ·  Oulu  ·  Turku  ·  Jyväskylä  ·  Kuopio  ·  Lahti  ·  Pori  ·  Joensuu  ·  Lappeenranta  ·  Vaasa  ·  Hämeenlinna  ·  Seinäjoki  ·  Rovaniemi  ·  Mikkeli  ·  Kotka  ·  Kokkola  ·  Lohja  ·  Hyvinkää  ·  Kajaani  ·  Savonlinna  ·  Imatra  ·  Sastamala  ·  Tornio  ·  Iisalmi  ·  Varkaus  ·  Kemi

Browse every place A–Z

A  B  D  E  F  G  H  I  J  K  L  M  N  O  P  R  S  T  U  V  Y

Example postal codes

• 00550
• 00011

Postal codes by place

The 60 places in Finland with the most postal codes recorded, listed alphabetically. Larger towns link to their own page.

Watch the leading zero

Some Finland postal codes begin with a zero, such as 00002. Spreadsheets and some web forms silently drop it, turning 00002 into 2 — which is either a different place or not a valid code at all. Format the column as text before pasting codes into a spreadsheet.

How an address is written in Finland

This is the order Finland's postal service expects. Square brackets mark what you replace.

[Recipient name]
[Street address]
FI-[Postal code (00550)] [City]
FINLAND

A postal code is required in a complete Finland address.

Look up a specific address

For the code covering one particular street or building, Finland's postal service publishes an official finder: support.posti.fi/fi/tyokalut/postinumerohaku.html. It is authoritative and kept current, which third-party copies often are not.

Country reference

Sources and licensing

Postal code data from GeoNames, used under the Creative Commons Attribution 4.0 International licence. Address formats and validation rules derive from Google's international address metadata, cross-checked against Universal Postal Union addressing standards. Last verified August 2026. Confirm time-critical addresses with the destination country's postal operator.