ISO 3166-2:PR

ISO 3166-2:PR is the entry for Puerto Rico in ISO 3166-2, part of the ISO 3166 standard published by the International [Organization for Standardization], which defines codes for the names of the principal subdivisions of all countries coded in ISO 3166-1.
Currently no ISO 3166-2 codes are defined in the entry for Puerto Rico.
Puerto Rico, an insular area of the United States, is officially assigned the ISO [3166-1 alpha-2] code. Moreover, it is also assigned the ISO 3166-2 code under the entry for the United States.