Key:ISO3166-1

When tagging a country, ISO3166-1=* indicates an ISO 3166-1 country code of that country. You can use the ISO Online Browsing Platform to lookup these codes.

This tag can be added to:

• a node representation of the country (usually tagged as place=country);
• a boundary relation of the country (usually tagged as boundary=administrative and admin_level=2).

Use more specific keys to differentiate different types of ISO 3166-1 codes

ISO 3166-1 defines multiple types of country codes. You can use more specific keys to differentiate these different types, both as a mapper and as a data consumer:

• ISO3166-1:alpha2=* for two-letter codes;
• ISO3166-1:alpha3=* for three-letter codes;
• ISO3166-1:numeric=* for three-digit codes.

In practice, the ISO3166-1=* key is used in the same way as ISO3166-1:alpha2=*, i.e. indicating the two-letter code. The latter key has the advantage that this intention is made explicit. For backward compatibility, data consumers looking for two-letter country codes can first read ISO3166-1:alpha2=* and fall back to ISO3166-1=* if ISO3166-1:alpha2=* is not available.

See Country code#ISO 3166-1 for more information about ISO 3166.