| Type: | commune |
| County: | Prahova |
| Official Name: | Cerașu |
| Coordinates: | 45.3167°N 28°W |
| Leader Name: | Alin-Remus Staicu[1] |
| Leader Party: | PNL |
| Term: | 2020 - 2024 |
| Area Total: | 120.7 |
| Population Total: | auto |
| Postal Code: | 107140 |
| Area Code: | +(40) 244 |
Cerașu is a commune in Prahova County, Muntenia, Romania. It is composed of six villages: Cerașu, Slon, Valea Borului, Valea Brădetului, Valea Lespezii, and Valea Tocii.
Cerașu borders the following communes: Chiojdu (Buzău County) and Vama Buzăului (Brașov County) to the north; Măneciu to the west; Izvoarele and Drajna to the south; and Posești, Bătrâni, and Starchiojd to the east.