Manziana is a municipality with 7269 inhabitants ( 31 December 2012) in the province of Rome in the Italian region of Lazio.
Manziana located 47 km northwest of Rome and 7 km northwest of Bracciano. The municipality belongs to the Sabatini mountains west of Lake Bracciano. The area is of volcanic origin, which still shows up in the Caldara di Manziana.
The municipality consists of the villages Quadroni and Ponte Mariano.
Manziana situated on the state road SS 493 Braccianese Claudia that leads to Rome. It has a station on the regional railway line Rome - Viterbo FR3.
Lucia Dutto ( civil list Manziana Ritrovata ) was elected in May 2007 to the Mayor.