Campochiaro borders the following municipalities: Castello del Matese, Colle d'Anchise, Guardiaregia, Piedimonte Matese, San Gregorio Matese, San Polo Matese, Vinchiaturo.
Excavations in the necropolis of Vicenne-Campochiaro near Boiano which dates from the 7th century, found among 130 burials that there were 13 human burials alongside horses along with artifacts of Germanic and Avar origin.
San Polo Matese borders the following municipalities: Bojano, Campochiaro, Colle d'Anchise, San Gregorio Matese.