Municipio Roma IX is the ninth administrative subdivision of Rome (Italy).

It was established by the Capitoline Assembly with Resolution no.

11 of 11 March 2013 and replaces Municipio Roma XII (former "Circoscrizione XII").

It is located in the southern area of the city and includes the Decima-Malafede and the Laurentino-Acqua Acetosa nature reserves.

In the territory of the municipio there are the following districts of Rome: The urban subdivision of the territory includes the thirteen urban zones of the former Municipio Roma XII; the population is distributed as follows:[1] The following frazioni of Rome are included in the area of the Municipio: