ISO 3166-2:AT is the entry for Austria in ISO 3166-2, part of the ISO 3166 standard published by the International Organization for Standardization (ISO), which defines codes for the names of the principal subdivisions (e.g., provinces or states) of all countries coded in ISO 3166-1.

Currently for Austria, ISO 3166-2 codes are defined for 9 states.

Each code consists of two parts, separated by a hyphen. The first part is AT, the ISO 3166-1 alpha-2 code of Austria. The second part is a digit (1–9).

Current codes

Subdivision names are listed as in the ISO 3166-2 standard published by the ISO 3166 Maintenance Agency (ISO 3166/MA).

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Code	Subdivision name (de)	Subdivision name (en) ^{[note 1]}
AT-1	Burgenland	Burgenland
AT-2	Kärnten	Carinthia
AT-3	Niederösterreich	Lower Austria
AT-4	Oberösterreich	Upper Austria
AT-5	Salzburg	Salzburg
AT-6	Steiermark	Styria
AT-7	Tirol	Tyrol
AT-8	Vorarlberg	Vorarlberg
AT-9	Wien	Vienna