Nino Valeri (28 April 1897 - 26 April 1978) was an Italian historian.
Nino Valeri was born in Padua. His father, Silvio Valeri, was a pharmacist. His uncle, Diego Valeri (1887-1976), had built up a reputation in Italy as a poet, literary scholar and translator. Another uncle was the painter .
Nino Valeri worked as a history professor at the universities of Catania, Trieste and Rome, where he took over his teaching chair in contemporary history from Federico Chabod. In 1957 he became a corresponding fellow of the at Turin, and in 1962 of the Rome based Accademia dei Lincei. He wrote various essays on themes from medieval history, Italian history and modern/contemporary history. Particularly notable among his books are his works on Giovanni Giolitti (1971) and on political conflict in Italy between 1860 and 1925 ("La lotta politica in Italia dall'unità al 1925", 1945). He contributed to various periodicals and academic journals, such as the Nuova Rivista Storica. He also took charge of the collations "History of Italy" ("Storia d'Italia") and "Society in the new Italy" ("La vita sociale della Nuova Italia") produced by the in Turin.