Senerchia (Sinerchia in the local dialect) is an Italian municipality with 1370 registered voters, but only 1036 inhabitants, in the Province of Avellino, located in the upper valley of the Sele River in Campania. It was the site of the defeat of Spartacus and is noted for the ruins of an ancient castle.
Senerchia mainly borders the Province of Salerno, and it is surrounded by the Picentini Mountains. Its main road links it to the town of Quaglietta.
Senerchia borders the municipalities of Acerno (SA), Campagna (SA), Oliveto Citra (SA), Valva (SA) and Calabritto, the only neighbouring municipality in the same province.
The village is located 600 metres (2,000 ft) above sea level in the High Sele Valley, in a hilly area on the eastern side of the Picentini Mountains, at the foot of the steep slopes of Mount Boschetiello. The territory is composed of forests and mountains, including many peaks over 1,500 metres (4,900 ft) above sea level, such as Mount Boschetiello at 1,574 metres (5,164 ft), Mount Croce at 1,533 metres (5,030 ft), Raia della Volpe at 1,631 metres (5,351 ft), Sierro dei Cuoppi at 1,683 metres (5,522 ft), Sierro della Pica at 1,536 metres (5,039 ft) and Raia del Pastore at 1,524 metres (5,000 ft). The hilly terrain starts at 600 metres (2,000 ft) and continues down the country on the right bank of the river Sele. The territory is full of springs and landslide soil. In addition to the Sele, which skirts the municipal area, other waterways include the Vallone Forma, Piceglia, Fiumicello Rovivo, Pozzo San Nicola and Acquabianca.