The findings of funeral remains and ordinary objects from the period confirms the importance of the Celts in the creation of this village and of the own culture of its inhabitants even nowadays(in this area are still spoken local variants of Gallo-italic languages, that had an important contribution by Gauls) Later, however, with the Roman colonization that had slowly decentralized the settlement and due to constant floods of the same double, the population of ancient Vaprio moved to the flat and more fertile area where the village is still located today.

In medieval times it was assigned to the Committee of Pombia; it then passed under the Counts of Biandrate in 1152, and from that period followed the fate of a larger neighbouring municipality, Momo.

Then, in 1534, Vaprio was sold for 16,800 lire(local money) to the lord of - Fontaneto d'Agogna, Galeazzo Visconti, remaining under this family until the early nineteenth century.

In the Baroque period Vaprio experienced a slight expansion, so much so that a small religious brotherhood was established in the municipality and founded a modest monastery; today, however, nothing remains of it.

The most famous member of the family, Gian Battista Caccia(called Cacìta by vapriese, because he wasn't really tall) is said to have inspired the main antagonist of Alessandro Manzoni's I Promessi Sposi.