Nepi (anciently Nepet or Nepete) is a town and comune in the province of Viterbo, Lazio, central Italy. The town lies 30 kilometres (19 mi) southeast of the city of Viterbo and about 13 kilometres (8 mi) southwest from Civita Castellana.
The town is known for its mineral springs, sold and bottled under the Acqua di Nepi brand throughout Italy.