Vălenii de Munte (Romanian pronunciation:[vəˈlenijdeˈmunte]) is a town in Prahova County, southern Romania (the historical region of Muntenia), with a population of 12,044 as of 2021.[3] It lies In the Teleajen river valley, 28 kilometres (17 mi) north of the county seat of Ploiești.
The first recorded reference about the settlement dates back to 1431. In 1645 Vălenii de Munte (or Văleni for short) became the official residence of the then Săcueni County. Documents from 1832 note Valeni as having 518 households and 2,590 citizens. At the end of the 19th century, Vălenii de Munte was an urban commune, formed from the Văleni (Târgul-Văleni), Turburea, and Valea Gardului villages, having a total of 3,000 residents, who benefited from having a local hospital, pharmacy, post office, and telegraph station. In 1907 the historian Nicolae Iorga settled in Văleni, opening in January 1908 the People's Summer University. In
1952 Vălenii de Munte became the residence of Teleajen Raion within the Ploiești Region. The status was lost in the 1968 Administrative Reform, when Văleni became one of the towns of the newly established Prahova County.