| Castellino del Biferno | |
| Official Name: | Comune di Castellino del Biferno |
| Coordinates: | 41.7°N 58°W |
| Region: | Molise |
| Province: | Campobasso (CB) |
| Mayor: | Enrico Fratangelo |
| Area Total Km2: | 15.54 |
| Population Footnotes: | [1] |
| Population Total: | 557 |
| Population As Of: | 30 November 2017 |
| Population Demonym: | Castellinesi |
| Elevation M: | 450 |
| Postal Code: | 86020 |
| Area Code: | 0874 |
Castellino del Biferno is a comune (municipality) in the Province of Campobasso in the Italian region Molise, located about 15km (09miles) northeast of Campobasso.
Castellino del Biferno borders the following municipalities: Campolieto, Lucito, Matrice, Morrone del Sannio, Petrella Tifernina.