Prahova County is located on the Prahova valley, between the Baragan Camp and the Carpathian Mountains, in the historical Muntenia province. It is bordered by the counties of Brasov, Buzau, Ialomita, Ilfov, Dambovita.
It has an area of 4,716 sq km and a population of 823,509. The county has 2 municipalities, 12 cities and 89 communes.