Arcinazzo Romano is a comune (municipality) in the Province of Rome in the Italian region Latium, located about 50 kilometres (31 mi) east of Rome.
Arcinazzo Romano borders the following municipalities: Affile, Jenne, Piglio, Roiate, Serrone, Subiaco, Trevi nel Lazio. It was called Ponza until 1891.
The area of Arcinazzo includes a wide plateau (Altopiano in Italian), a popular holiday resort; the plateau is home to the remains of a Roman villa, the hunting residence of emperor Trajan.
- ^ All demographics and other statistics: Italian statistical institute Istat.