Montalto di Castro is a comune (municipality) in the Province of Viterbo in the Italian region Lazio, located about 90 kilometres (56 miles) northwest of Rome and about 40 kilometres (25 miles) west of Viterbo.
It is home to a large fossil-fuel powered power plant managed by ENEL and the largest solar PV power plant in Italy.
Montalto di Castro is linked by road to the European route E80 motorway. The Italian state railway Ferrovie dello Stato Italiane provides a rail link that allows passengers to travel to Rome, Pisa, Orbetello, or Civitavecchia.
- ^ All demographics and other statistics: Italian statistical institute Istat.