The Castle of Sabbionara (also Castle of Avio) is a medieval castle in the comune Avio, Trentino, northern Italy. It is currently hold by the Fondo per l'Ambiente Italiano (FAI). It is one of the several castles commanding the Vallagarina valley of the Adige River.
The castle is mentioend for the first time in a 1503 document as Castellum Ava. In the 12th century it was owned by the Castelbarco family, who ceded it to the Republic of Venice in 1411. The latter enlarged it and added a chapel dedicated to St. George, together with a façade showing the dogi' coats of arms.
In 1509 the castle was conquered by the troops of Maximilian I of Austria who, after painting his insignia on the façade, gave it to the counts of Arco. After several changes of property, in the 17th century the counts of Castelbarco bought it back.
The castle features three lines of walls, with five towers. AMong the latter, the so-called Torre della Picadora was the place were executions (through hanging) were carried on. In the interior is the massive mastio, surrounded by several edifices, including the Baronal Palace.