Dumbrava is a commune in Prahova County, in the historical region of Muntenia, Romania. It is located in the south-central part of the country, within the administrative framework of Prahova County, whose seat is the city of Ploiești.
The commune is composed of six villages: Ciupelnița, Cornu de Sus, Dumbrava, Trestienii de Jos, Trestienii de Sus, and Zănoaga. The village of Dumbrava serves as the administrative center of the commune.
Like other communes in Prahova County, Dumbrava is a rural administrative unit that groups several villages under a single local government. The county itself lies in the Muntenia region, north of Bucharest, and is known for its oil industry and for the Carpathian mountain resorts along the Prahova Valley.