Vejano or Veiano (Italian pronunciation: [veˈjaːno]) is a comune (municipality) in the Province of Viterbo, formerly known as Tuscia, in the Italian region of Latium, located about 60 kilometres (37 mi) northwest of Rome and about 40 kilometres (25 mi) south of Viterbo on the Mignone river.

The main monument of the village is La Rocca, an imposing castle, excavated in tuff rock, with a triangular shape and fortified walls.

[4] The name possibly comes from Veio, the Etruscan city just to the north of Rome that was defeated by the Romans in 396 BC.

In the Augustan era, Vejano became an important centre as it was situated along the route of the Via Clodia.

Other properties were sold by the Altieris at the beginning of the 20th Century, to a university and to private citizens.