The Volturno is a river in south-central Italy. It rises in the Abruzzese Apennines near Alfedena and flows southeast as far as its junction with the Calore River near Caiazzo. It then turns southwest, past Capua, to enter the Tyrrhenian Sea northwest of Naples. The river is 175 km long.

Following the invasion of southern Italy by revolutionary forces led by Giuseppe Garibaldi in 1860, Francis II of the Two Sicilies fled from Naples and took up a defensive position behind the Volturno. Garibaldi's troops defeated the Neapolitan forces at the Battle of the Volturno on October 1st and 2nd.

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