[1] The Kuybyshev Reservoir has a surface area of 6,450 km² and a volume of 58 billion cubic meters.

The major cities of Kazan, Ulyanovsk, and Tolyatti are adjacent to the reservoir.

Lenin Volga Hydroelectric Station), located between the cities of Zhigulevsk and Tolyatti in Samara Oblast.

[citation needed] With the filling of the reservoir in the 1950s, some villages and towns were submerged by the rising water and were rebuilt on higher ground.

[citation needed] In 1926, a fossilized tooth of Ptychodus latissimus paucisulcata was found in redeposited sediments of Tunguz sand spit, which was later flooded by the waters of the reservoir.