The Neva Bay (Russian: Невская губа, Nevskaya Guba), also known as the Gulf of Kronstadt, is the easternmost part of the Gulf of Finland between Kotlin Island and the Neva River estuary where the city of St. Petersburg is sited.

The unfinished Saint Petersburg Dam separates the bay from the Baltic Sea.
It has a surface area of 329 km². The entire coastline is designated part of St. Petersburg rather than of Leningrad Oblast.

The bay is also informally known as "the Marquis's Pool" after Jean Baptiste, marquis de Traversay, the Russian naval minister who regarded the shallow waters of the bay as an ideal place for holding naval exercises.
Category:Neva basinCategory:Bays of the Baltic SeaCategory:Bays of RussiaCategory:Geography of Saint Petersburgru:Невская губаuk:Невська губа