The Vozha (Russian: Во́жа) is a river in Ryazan Oblast, Russia.

It is a right tributary of the Oka.

It is 103 kilometres (64 mi) long, and its drainage basin covers 1,590 square kilometres (610 sq mi).

[1] The town of Rybnoye is situated by the Vozha.

In August 1378, Muscovite prince Dmitry Donskoy defeated a Mongol army in the Battle of the Vozha River.