Guidonia Montecelio
| Guidonia Montecelio | |
|---|---|
| Comune di Guidonia Montecelio | |
| Panorama of Guidonia | |
| Guidonia within the Metropolitan City of Rome Capital | |
| Location of Guidonia Montecelio | |
| Coordinates: 42°00′N 12°43′E / 42.000°N 12.717°E | |
| Country | Italy | 
| Region | Lazio | 
| Metropolitan city | Rome (RM) | 
| Frazioni | Albuccione, Bivio di Guidonia, Colle Fiorito, Colleverde, La Botte, Marco Simone, Montecelio, Pichini, Setteville, Setteville Nord, Villalba, Villanova | 
| Government | |
| • Mayor | Mauro Lombardo | 
| Area | |
|  • Total | 79.47 km2 (30.68 sq mi) | 
| Elevation | 105 m (344 ft) | 
| Population  (31 August 2021) | |
|  • Total | 86,814 | 
| • Density | 1,100/km2 (2,800/sq mi) | 
| Demonym | Guidoniani | 
| Time zone | UTC+1 (CET) | 
| • Summer (DST) | UTC+2 (CEST) | 
| Postal code | 00010, 00011, 00012, 00014 | 
| Dialing code | 0774 | 
| Patron saint | Maria Beata Vergine di Loreto | 
| Saint day | 10 December | 
| Website | Official website | 
Guidonia Montecelio (Italian pronunciation: [ɡwiˈdɔːnja ˌmonteˈtʃɛːljo]), commonly known as Guidonia, is a town and comune in the Metropolitan City of Rome Capital, Lazio, central Italy.