Upa

Water type: River
Basin: Oka -> Volga -> Caspian Sea -> Planet Earth
Continent: Europe
Climate: Continental
Country: Russia

The Upa (Russian: Упа́) is a river in Tula Oblast, Russia, and one of the main tributaries of the Oka.

The river is 345 kilometres long, and has a drainage basin of 9,510 square kilometres . The city of Tula is situated on its banks. The name of the river is of Baltic origin. This is probably one of the oldest baltic hydronims.