ISO 3166-2:SO is the entry for Somalia 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.
ISO 3166-2 codes have been assigned to Somalia's 18 administrative regions. Each code consists of two parts, separated by a hyphen. The first part is SO, the ISO 3166-1 alpha-2 code of Somalia. The second part is two letters.