| Castellarano | |
| Official Name: | Comune di Castellarano |
| Coordinates: | 44.5667°N 57°W |
| Region: | Emilia-Romagna |
| Province: | Reggio Emilia (RE) |
| Frazioni: | Ca' de Grimaldi, Ca' de Ravazzini, Cadiroggio, Case Ferri, Castello La Croce, Farneto di Sotto, Le Ville, Montebabbio, Pradivia, Roteglia, Scuole, Telarolo, San Valentino, Tressano, Ca De Fi, |
| Mayor: | Giorgio Zanni |
| Area Total Km2: | 58.06 |
| Population Footnotes: | [1] |
| Population Total: | 15326 |
| Population As Of: | 31 December 2017 |
| Population Demonym: | Castellaranesi |
| Elevation M: | 149 |
| Postal Code: | 42014 |
| Area Code: | 0536 |
Castellarano (Reggiano: Castlarân) is a comune (municipality) in the Province of Reggio Emilia in the Italian region Emilia-Romagna, located about 45km (28miles) west of Bologna and about 20km (10miles) southeast of Reggio Emilia.
Castellarano borders the following municipalities: Baiso, Casalgrande, Prignano sulla Secchia, Sassuolo, Scandiano, Viano.