Lioni is a town and comune in the province of Avellino, Campania, southern Italy.
Located in western Irpinia, in the Monti Picentini natural park, the municipality borders with Bagnoli Irpino, Calabritto, Caposele, Morra De Sanctis, Nusco, Sant'Angelo dei Lombardi and Teora. It is 50 kilometres from Avellino and is linked by a mountain road to the ski resort of Laceno.