For a river in the Czech Republic, see Úpa River
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Upa (Russian: Упа́) is a river in Tula Oblast, Russia, one of the main tributaries of the Oka River.
The river is 345 km long; the city of Tula is situated on its banks. The name of the river is of Baltic origin.
- ^ E.M. Pospelov, Geograficheskie nazvaniya mira (Moscow: Russkie slovari, 1998), p. 423: "cf. Lithuanian ùpė, upìs, upỹs, Latvian upe 'river, stream.'"
Coordinates: 54°02′07″N 36°20′03″E / 54.03528°N 36.33417°E