This category collects articles about the rivers of Nizhny Novgorod Oblast — from major waterways to small urban streams hidden in underground culverts. The region's water network shaped its history and geography: the Volga (disambiguation) and the Oka formed the character of Nizhny Novgorod itself, while rivers such as the The Kerzhenets River and the Pyana are tied to important chapters of local history and culture. Among the city's rivers, the Pochaina deserves particular attention — an underground river by the walls of the Kremlin that once played a role in the city's defense.