Rybinsk Reservoir
Rybinsk Reservoir, the lock
Rybinsk Reservoir Show map of Yaroslavl Oblast Rybinsk Reservoir Show map of Tver Oblast Rybinsk Reservoir Show map of Vologda Oblast Rybinsk Reservoir Show map of European Russia
Coordinates	58°22′N 38°26′E / 58.367°N 38.433°E / 58.367; 38.433
Type	Hydroelectric reservoir
Primary inflows	Volga, Sheksna, Mologa
Basin countries	Russia
Surface area	4,580 km2 (1,770 sq mi)
Average depth	5.6 m (18 ft)
Max. depth	30 m (98 ft)
Water volume	25.4 km3 (6.1 cu mi)
Surface elevation	102.4 m (336 ft)
Settlements	Cherepovets Vesyegonsk

Rybinsk Reservoir ([Рыбинское водохранилище] Error: {{Lang}}: invalid parameter: |3= (help), IPA: [ˈrɨbʲɪnskəɪ vədəxrɐˈnʲilʲɪɕə]), informally called the Rybinsk Sea, is a water reservoir on the Volga River and its tributaries the Sheksna and Mologa, formed by Rybinsk Hydroelectric Station dam, located in the Tver, Vologda, and Yaroslavl Oblasts. At the time of its construction, it was the largest man-made body of water on Earth.^[1] It is the northernmost point of the Volga. The Volga–Baltic Waterway starts from there. The principal ports are Cherepovets in Vologda Oblast and Vesyegonsk in Tver Oblast.

The construction of the dam in Rybinsk started in 1935. The filling of the reservoir started on April 14, 1941, and continued until 1947. Some 150,000 people had to be resettled elsewhere, and the historic town of Mologa in Yaroslavl Oblast along with 663 villages completely disappeared under water. Today the dam is less important for hydroelectric power supply (output is 346 MW) than it used to be.

• Detailed map of the reservoir (in Russian)
• Webpage of the Leushino Monastery, now submerged under the waters of the Rybinsk Sea (in Russian)

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