Upper Volga Region

The Volga region, known as the ( , ; rus, Поволжье, r=Povolžje, p=pɐˈvoɫʐje; ), is a historical region in Russia that encompasses the drainage basin of the Volga River, the longest river in Europe, in central and southern European Russia.

The Volga region is culturally separated into three sections:
* Upper Volga Region – from the Volga River's source in Tver Oblast to the mouth of the Oka River in Nizhny Novgorod;
* Middle Volga Region – from the mouth of the Oka River to the mouth of the Kama River south of Kazan;
* Lower Volga Region – from the mouth of the Kama River to the Volga Delta in the Caspian Sea, in Astrakhan Oblast.

The geographic boundaries of the region are vague, and the term ''Volga region'' is used to refer primarily to the Middle and Lower sections, which are included in the Volga Federal District and Volga economic region.

Geography

The Volga Region is almost entirely within the East European Plain, with a notable distinction contrasting the elevated western side featuring the Volga Upland, and the eastern side known as Transvolga (, ''Zavolžje''). The latter consists of the elevated High Transvolga and the lowland Low Transvolga. The Idel-Ural region, a collection of six federal subjects between the Volga River and the Ural Mountains, is generally considered as a part of the Volga Region, although the river does not run through each of them. Idel-Ural is within an extensive north-western protrusion of the Volga River's drainage basin, including numerous tributaries such as the Malaya Kokshaga River