San Giovanni in Galdo borders the following municipalities: Campobasso, Campodipietra, Campolieto, Matrice, Monacilioni, Toro.

Families with the surnames of DiCesare,Trotta, DeMaioribus, Marino, Ramacciato, Santone and Di'Orio.

San Giovanni in Galdo is the site of a Samnitic sanctuary atop Colle Rimontato (709 meters a.s.l.).

[4] Excavated between 1974 and 1976, the sanctuary took the form of a frontal Italic podium temple surrounded by a portico.

[5] The ritual activity at the sanctuary was confine to a limited area, likely indicating that the temple served a discrete, local population.