Moksha

Water type: River
Basin: Oka -> Volga -> Caspian Sea -> Planet Earth
Continent: Europe
Climate: Continental
Country: Russia

Moksha (Russian: Мо́кша, Moksha: Йов) is a river in central Russia, a right tributary of the Oka. It flows through Penza Oblast, Nizhny Novgorod Oblast, Ryazan Oblast and the Republic of Mordovia, and joins the Oka near Pyatnitsky Yar, near the city of Kasimov.

It is 656 kilometres in length, and has a drainage basin of 51,000 square kilometres.