ISO 3166-2:TJ is the entry for Tajikistan 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 Tajikistan, ISO 3166-2 codes are defined for 1 autonomous region, 2 regions, 1 capital territory, and 1 district under republic administration.
Each code consists of two parts, separated by a hyphen. The first part is TJ, the ISO 3166-1 alpha-2 code of Tajikistan. The second part is two letters.