| Montorio nei Frentani | |
| Official Name: | Comune di Montorio nei Frentani |
| Coordinates: | 41.75°N 70°W |
| Province: | (CB) |
| Mayor: | Pellegrino Nino Ponte |
| Area Total Km2: | 31 |
| Population Footnotes: | [1] |
| Population Total: | 407 |
| Population As Of: | 30 November 2017 |
| Population Demonym: | Montoriesi |
| Elevation M: | 654 |
| Postal Code: | 86040 |
| Area Code: | 0874 |
Montorio nei Frentani (Campobassan dialect: Mundòrj) is a small town and comune in the province of Campobasso (Molise), in Southern Italy.