The Kubr or Kubrya (, Кубря) is a river in the Yaroslavl Oblast of Russia. It rises in the Lyakhovo marshes and flows from the left into the Nerl, a right tributary of the Volga. It is long, and has a drainage basin of .«Река Кубрь (Кубря)», Russian State Water Registry The township of Kubrinsk takes its name from the river.

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