The Tbilisi Sea (Georgian: თბილისის ზღვა) or Tbilisi reservoir (თბილისის წყალსაცავი) is an artificial lake in the vicinity of Tbilisi that serves as a reservoir.

The lake has a length of 8.75 km and a width of 2.85 km.

The surface area of this reservoir is 11.6 km2 (4.5 sq mi).

It was opened in 1953 and has become a popular recreation spot.

[1][2] It is planned to develop the Tbilisi sea into a recreational park with various sports facilities.