| Agosta | |
| Official Name: | Comune di Agosta |
| Coordinates: | 41.9833°N 15°W |
| Region: | Lazio |
| Metropolitan City: | Rome (RM) |
| Frazioni: | Madonna della Pace, Le Selve, Cacino, Tostini, Il Barco, La Vasca |
| Mayor: | Gianfranco Massimi |
| Area Total Km2: | 9.5 |
| Population Total: | 1749 |
| Population As Of: | 31 August 2014 [1] |
| Population Demonym: | Agostani |
| Elevation M: | 392 |
| Postal Code: | 00020 |
| Area Code: | 0774 |
Agosta (Italian: label=[[Romanesco dialect|Romanesco]]|Austa) is a Italian: [[comune]] (municipality) in the Metropolitan City of Rome in the Italian region of Latium, located about 45km (28miles) east of Rome.
Located on a tuff rock in the Monti Simbruini area, Agosta borders the following municipalities: Canterano, Cervara di Roma, Marano Equo, Rocca Canterano, Subiaco.
The area of Agosta was inhabited since prehistoric times. It is mentioned in Augustus's Res Gestae as the source of the Aqua Marcia aqueduct, and after that it took its name from the Roman emperor. In 1051 AD a castle is mentioned here, which later was a possession of the monastery of Subiaco.