The Medveditsa or Medveditza (/mɛdˈvɛdɪtsə/; Russian: Медведица, romanized: Medvedica, IPA: [mʲɪdˈvʲedʲɪtsə]) is a river in Volgograd and Saratov Oblasts in Russia, a left tributary of the Don.

[1] The name means she-bear, and according to legend, it alludes to the large population of bears in the area in earlier times.

[2] The river has its sources on the Volga Uplands, in the northeastern parts of Saratov Oblast, and flows mainly in a southwestern direction.

Its largest tributaries are, from the right: Balanda and Tersa, and from the left: Idolga, Karamysh and Archeda.

Forests along both banks of the river have a wide variety of birds, medicinal herbs, wild berries, fruits and flowers.