| Upa | |
| Subdivision Type1: | Country |
| Subdivision Name1: | Russia |
| Length: | 345km (214miles) |
| Mouth: | Oka |
| Mouth Coordinates: | 54.0353°N 36.3342°W |
| Basin Size: | 9510km2 |
| Tributaries Right: | Plava |
The Upa (pronounced as /ru/) is a river in Tula Oblast, Russia, and one of the main tributaries of the Oka.
The river is long, and has a drainage basin of .[1] 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.Lithuanian word "upė", latvian word "upe" in english means "river", in russian means "река";[2]