The name Campolattaro may derive from the terms ‘campus’ and ‘Gactarius’ (a Frankish proper name, whose root ‘gat’ means forest). The town may have been named by Guido IV of Spoleto at the time of the conquest of the Duchy of Benevento.
The first historical references and the beginnings of the construction of the castle date back to the 12th – 13th century, the Norman period.
In 1138, the people rebelled against the established order and, as punishment, the king ordered the town to be burnt down.
In 1350, the town was integrated into the town of Benevento. It was the family of Michele Blanch, Marquis of San Giovanni, who owned the territory until the abolition of the feudal system.
The town of Campolattaro was significantly affected by the plague of 1656 and the cholera of 1837.
The town became part of the province of Benevento after the unification of Italy.
Today, the population of Campolattaro is around 1,000 inhabitants.