The Shelon (Russian: Шелонь) is a river in the northwest part of European Russia, in Dedovichsky, Porkhovsky, and Dnovsky Districts of Pskov Oblast and Soletsky and Shimsky Districts of Novgorod Oblast.

[2] The towns of Porkhov and Soltsy, as well as urban-type settlements of Dedovichi and Shimsk, are located on the banks of the Shelon.

In Novgorod Oblast, the Shelon flows northeast and has its mouth by the urban-type settlement of Shimsk, forming an estuary.

The river basin of the Shelon comprises vast areas on the Ilmen Depression which administratively are located in Soletsky, Shimsky, and Volotovsky Districts of Novgorod Oblast, and in Porkhovsky, Dnovsky, Dedovichsky, and Bezhanitsky Districts of Pskov Oblast.

It ended in a victory for the Muscovite army led by Prince Kholmsky, and consequently resulted in the annexation of Novgorod by Muscovy in 1478.