Marcellina is a municipality in the province of Rome in the Italian region Latium, located about 7198 inhabitants ( 31 December 2012). It is located 43 km northeast of Rome and 11 km north of Tivoli.
Marcellina is located north of Tivoli in the Lucretili. It is a member of the Comunità Montana Monti Sabini e Tiburtini.
The nearby towns are Guidonia Monte Celio, San Polo dei Cavalieri and Tivoli
The State Road 636 connects Marcellina with Tivoli and the A24 motorway, driveway Tivoli. The station Palombara - Marcellina (4 km away from the town) is located on the railway line Rome - Avezzano.
Alfredo Ricci (civic list Nuovi Mondi ) was elected in June 2009 for the mayor. He solved Isidoro Salvatori from (since 2004), who did not run.