ISO 3166-2:IT is the entry for Italy 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 Italy, ISO 3166-2 codes are defined for two levels of subdivisions:

Each code consists of two parts, separated by a hyphen. The first part is IT, the ISO 3166-1 alpha-2 code of Italy. The second part is either of the following:

For the regions, the first digit indicates the geographical region where the subdivision is in:

For provinces, the two-letter part is an abbreviation of the province name, such as 'PG' for Perugia, although, as an exception, the code for Medio Campidano (IT-VS) is based on its two capitals, Villacidro and Sanluri.

The two-letter provincial codes were used in vehicle registration plates between 1905 and 1994 (except Roma, whose vehicle code has always been ROMA instead of RM).

In 1994, a new universal notation was introduced, dropping the province code entirely. This proved to be unpopular, and the two-letter code (or "ROMA") has been allowed to be added to a new, EU-style, blue border of the plates since 1999.

ISO 3166-2 is part of the ISO 3166 standard published by the International Organization for Standardization (ISO), and defines codes for the names of the principal subdivisions (e.g., provinces or states) of all countries coded in ISO 3166-1. The official name of the standard is Codes for the representation of names of countries and their subdivisions – Part 2: Country subdivision code. It was first published in 1998.

The purpose of ISO 3166-2 is to establish an international standard of short and unique alphanumeric codes to represent the relevant administrative divisions and dependent territories of all countries in a more convenient and less ambiguous form than their full names. Each complete ISO 3166-2 code consists of two parts, separated by a hyphen:

Each complete ISO 3166-2 code can then be used to uniquely identify a country subdivision in a global context.

Currently more than 4000 codes are defined in ISO 3166-2. For some countries, codes are defined for more than one level of subdivisions.