Lost Youth (Italian: Gioventù perduta) is a 1948 Italian-language drama film directed by Pietro Germi.

It was remade in 1953 as the British film Black 13.

Two important future film directors, Mario Monicelli & Antonio Pietrangeli, co-wrote the script.

The film won 2 Nastro d'Argento awards: Best Script, Best Best Foreign Actor in Italian Film (Jacques Sernas).

This article related to an Italian film of the 1940s is a stub.