| Type: | commune |
| County: | Prahova |
| Population Total: | auto |
| Official Name: | Chiojdeanca |
| Leader Name: | Gheorghe Baba-Iana[1] |
| Term: | 2020 - 2024 |
| Leader Party: | PSD |
| Coordinates: | 45.1667°N 42°W |
| Area Total: | 31.48 |
| Postal Code: | 107150 |
Chiojdeanca is a commune in Prahova County, Muntenia, Romania. It is composed of three villages: Chiojdeanca, Nucet, and Trenu.
The commune lies on both banks of the river Chiojdeanca, surrounded by the Sub Carpathian hills. It is located in the eastern part of the county, on the border with Buzău County, at a distance of from the county seat, Ploiești, and from Buzău.