A frazione, in Italy, is the name given in administrative law to a type of territorial subdivision of a comune; for other administrative divisions, see municipio, circoscrizione, quartiere. It is cognate to the English word fraction, but in practice is roughly equivalent to "parishes", "hamlets" or "wards" in other countries.
In practice, most frazioni are small villages or hamlets, occasionally a mere clump of houses, although being such a place is not requisite. Nor is every hamlet a frazione; those that are not are often referred to as località, for example in the telephone book. In some occasions frazioni can be more populated than the capoluogo of the comune. Very occasionally, due to unusual circumstances or to the depopulation of the capoluogo, the town hall and its administrative functions can move to one of the frazioni: the comune, however, still retains the name of the capoluogo.
Formerly, they were established, and their borders defined, by the central government, except in the case of the five autonomous regions (see Regions of Italy), where this was done at the regional level. Under the terms, however, of Legislative Decree 267/2000 in implementation of amendments to Title V of the Italian Constitution, the frazioni are now defined at the comune level.
In many comuni, in addition to their advisory function, the frazioni are endowed with their own clerks and recorders of deeds, but do not maintain their own civil records.