Associazione Calcio Dilettantistica Guidonia Montecelio is an Italian association football club located in Guidonia Montecelio, Lazio.
The municipality of Guidonia Montecelio, formed by the main towns of Guidonia and Montecelio, lies to the north-east of Rome, some kilometres from the Grande Raccordo Anulare - a ring-shaped motorway which forms a circle around the capital.