Prut, or Pruth, (Прут) is a 953 km long river in Eastern Europe. It was known in antiquity as Pyretus or Porata (possibly) or Gerasius. It originates on the eastern slope of Mount Hoverla, in the Carpathian Mountains in Ukraine. It flows southeast to join the Danube river near Reni, east of Galaţi.
Between 1918 and 1940 it was almost entirely in Greater Romania. Nowadays, for a length of 695 km it forms the border between Romania and Moldova. It has a hydrographic basin of 27,500 km², of which 10,990 km² are in Romania and 7,790 km² in Moldova. The biggest city along its banks is Chernivtsi, Ukraine.
The Costeşti-Stînca/Stânca-Costeşti dam, operated jointly by Moldova and Romania, is built on the Prut.
The following towns are situated along the river Prut, from source to mouth: Delatyn, Kolomyia, Sniatyn, Chernivtsi, Novoselytsia, Darabani, Lipcani, Ungheni, Leova, Cantemir, Cahul.
The following rivers are tributaries to the river Prut:
Left: Racovăţ, Ciuhur, Lăpuşna, Sărata
Right: Cheremosh, Herţa, Poiana, Corneşti, Isnovăţ, Rădăuţi, Ghireni, Volovăţ, Badu, Başeu, Corogea, Berza Veche, Râioasa, Soloneţ, Cerchezoaia, Jijia, Cozmeşti, Bohotin, Moşna, Pruteţ, Sărata, Elan, Horincea, Oancea, Stoeneasa, Chineja