The Redya (Russian: Редья) is a river in Kholmsky, Poddorsky, Starorussky, and Parfinsky Districts of Novgorod Oblast in Russia.

The upper course of the river, including Lake Rdeyskoye, is located within Rdeysky Nature Reserve, which is a vast swampy unpopulated area.

The district administrative center, the selo of Poddorye, is located on the left bank of the Redya.

For approximately 20 kilometres (12 mi), the Redya forms the boundary between Starorussky and Parfinsky Districts.

In its lower course, it departs from the boundary back into Starorussky District and joins the Lovat, forming a joint delta with the Lovat, the Pola, and the Polist.