Åland ZIP Code Dataset

Comprehensive Åland ZIP code data with accurate geographic coordinates, administrative divisions, and time zone

Åland's Postal Code Format

Åland uses a “Postnummer” system. The postal code format is 99999, which is a five-digit numeric format with no letters or separators. According to the GeoPostcodes world postal code database, Åland has 40 postal codes covering 20 regions and 32 towns. This format is similar to numeric US ZIP codes as both are numeric, but US ZIP codes are five digits long and typically do not have a space in the middle.
  • Postal Code Format: 99999

    • Five-digit numeric format
    • Uniform codes across the islands
    • Linked to Finland’s system with separate codes
    • 40 postal codes covering 20 regions and 32 towns

    Provincial Examples:

    • 22100 - Mariehamn
    • 22310 - Jomala
    • 22820 - Godby
    • 22270 - Eckerö
  • Structure of Postal Codes

    • Format: 5-digit numeric (e.g., 22100).
    • Hierarchical levels: Based on municipality and village groupings.
    • Key challenges: Dependence on Finland’s infrastructure, small population coverage.
  • Management & Authority

    • Primary postal authority: Posten Åland.
    • Update frequency: Regular updates, aligned with Finland.
  • Addressing Standards

    • Common address format: Street + number, postal code + locality.
    • Administrative divisions used: Municipalities, localities.
  • Special Characteristics

    • Åland uses its own postmarks and issues stamps.
    • Though codes are numeric, they are distinct from mainland Finland.

Our location dataset for Åland

Explore our comprehensive collection of Åland ZIP code and administrative data products, designed to meet all your mapping and location intelligence needs.

Åland ZIP & Administrative boundaries

Comprehensive boundary data from GeoPostcodes for all Åland postal codes, provinces, territories, and administrative divisions.

Åland Administrative Divisions

The database follows a standardized and unified structure you can integrate without becoming an expert in each country’s unique administrative hierarchy.

Key Features:

  • 247 countries
  • Unified global hierarchy
  • Up to 5 administrative levels
  • Includes complex geographies

Åland Address Format

The GeoPostcodes database ensures addresses follow the correct format for Åland, ensuring a smooth address validation experience.

Our database offers comprehensive address validation to reduce delivery errors and improve efficiency.

Address validation - Åland address validation

Comprehensive Åland ZIP code, city, and address data to verify and correct existing addresses at input, post-entry, or in bulk.

Coverage Statistics

40

Total ZIP Codes

20

Provinces & Territories

32

Cities & Towns

Available File Formats

Choose from multiple data formats to seamlessly integrate Åland postal code data into your systems
CSV Format

Comma-separated values for
spreadsheet applications and data analysis tools

GeoJSON Format

JavaScript Object Notation for
web applications and modern development

GML Format

Extensible Markup Language for enterprise systems and legacy applications

DAT Format

Database-ready SQL scripts for
direct import into your systems

Data Dictionary

Comprehensive field definitions and data specifications for the Åland postal code dataset
Field nameField typeDescriptionComments
ISOChar(2)ISO 3166-1 Country codeThe ISO 3166-1 standard is published by the International Organization for Standardization (ISO) and defines a unique code for the name of each country. The country codes are represented as a two-letter code (alpha-2).
CountryChar(50)Country name
LanguageChar(2)Language codeWhen there are several official languages in the country, or for countries using a non-Latin alphabet, we provide the names in different languages. The language field contains the language code and allows you to select a specific version.
Region1
Region2
Region3
Region4
Char(80)
Administrative division level 1
Administrative division level 2
Administrative division level 3
Administrative division level 4
These fields contain the name of administrative divisions for each available level. If not applicable, the value '-' will be indicated.
LocalityChar(80)Locality nameContains the settlement name. The type of settlement may vary depending on the country (city, town, village, etc..).
PostcodeChar(15)ZIP / Postal codeIn countries/places where there is no postal code in use, this field is left empty. The postcode structure varies for each country.
Latitude
Longitude
DoublePlace coordinates (WGS84 coordinates)These fields contain the geographic coordinates related to the specific locality and postal code of the record. The geographical position is usually precise to about one hundred meters and corresponds to the center of the locality. All our files are created using the World Geodetic System standard WGS 84. The corresponding SRID reference is EPSG:4326.
TimezoneChar(30)Time zone name (Olson)Following the timezones defined in the IANA tz database (sometimes called Olson database).

Why choose GeoPostcodes

Global coverage

Complete coverage across 247 countries, including hard-to-source geographies like China, Japan, Brazil, and Russia.

Highest quality

Built on extensive, authoritative sourcing with robust data engineering and quality control. Standardized and up-to-date.

Expert Consulting

With 15 years of experience, we guide your implementation and deliver data in the format that fits your system.

Global Location Databases

Comprehensive location data products serving businesses, and
organizations worldwide with accurate, up-to-date geographic information.

Postal Code Database

Global dataset containing all administrative divisions, cities and zip codes.

Key features

  • 247 Countries
  • 9,9M Coordinates
  • 9,3M Postal Codes
  • 400 Time zones
  • 4M Cities and Towns
  • 116K UNLOCODES

Specifications

  • Coverage: Global
  • Format: CSV, ASC, DAT, GML, GeoJSON, KML, Shapefile (SHP)

Boundary Data

A global dataset of polygons representing postal codes and administrative areas.

Key features

  • 247 Countries
  • Up to 6 levels
  • 1,7M boundaries
  • High-precision
  • 245K Admin areas
  • Visualization

Specifications

  • Coverage: Global
  • Format: GeoJSON, Geopackage, KML, Shapefile (SHP)

Population Database

Global population estimates at postal code and administrative level covering a span of 55 years: past, present, and future.

Key features

  • 247 Countries
  • 243K Admin areas
  • 55 year span
  • Yearly updates
  • 645K ZIP codes

Specifications

  • Coverage: International
  • Format: CSV, ASC

Address Database

International dataset with all administrative areas, cities, streets, and relevant postal codes.

Key features

  • 81 Countries
  • 299 languages
  • 26,5M streets
  • 400 time zones
  • 9.3M ZIP codes
  • 4M cities

Specifications

  • Coverage: International
  • Format: CSV, ASC, DAT, GML, KML, Shapefile (SHP), GeoJSON

Ready to Get Started?

Download our sample Åland postal code dataset.
Updated: April 1, 2026

Frequently Asked Questions

The ZIP code for Mariehamn is 22100.
An example of a 5-digit ZIP code (Postnummer) in Åland is 22100 for Mariehamn.

Yes. Åland uses ZIP codes (Postnummer) consisting of five digits, formatted as 99999.

Yes — Åland uses postal codes (Postnummer). The format is five digits (99999), applied across its 32 cities and municipalities.
No town in Åland has the ZIP code 12345; that postnummer is not assigned within Åland.
Yes. Åland uses five-digit postal codes (Postnummer) in the format 99999, which serve the same purpose as U.S. ZIP codes for mail sorting and delivery; Åland’s 32 cities are covered by local postnummer ranges.
Yes. Åland uses a postal code (Postnummer) system consisting of five-digit codes in the format 99999.
The country code 248 (ISO 3166-1 numeric code for Åland) is sometimes mistaken for a ZIP code.

Recipient Name
Street Name 12
Postnummer City
Åland

Place the five-digit Postnummer (format 99999) before the city name on the same line.

Åland does not have a single ZIP code; it uses multiple five-digit postnummer (format 99999) for its 32 municipalities. For example, Mariehamn’s ZIP code is 22100.
The postal code format in Åland is five digits written as 99999; the term used is Postnummer.
A ZIP code (postnummer) in Åland consists of five digits (format 99999).

Yes. Addresses in Åland include a five‑digit postal code (Postnummer) in the format 99999. The postnummer is written before the locality on mailing addresses.

Example:
Storgatan 1
22100 Mariehamn