Câmpina (Romanian pronunciation: [ˈkɨmpina]) is a city in Prahova County, Romania, north of the county seat Ploiești, located on the main route between Wallachia and Transylvania.

Câmpina is crossed by national road DN1, which links Bucharest, 100 km (62 mi) to the south, with the northwestern part of the country.

The Câmpina railway station (opened in 1879) serves the CFR Main Line 300, which runs parallel to DN1, on the right bank of the Prahova.

Formerly a customs point on the trade route between Transylvania and Wallachia, the town developed at the end of the 19th century and the beginning of the 20th century as an oil extraction and processing center.

Between 1897 and 1898, Câmpina was the site of the largest oil refinery in Europe.