Tallinn Bay (Estonian: Tallinna laht) is a bay in Estonia on the southern coast of the Gulf of Finland. The Estonian capital city Tallinn is located on the southern coast of the bay.^[1]

Tallinn Bay itself is divided into several parts: Tallinn Roadstead (Estonian: Tallinna reid), Kopli Bay, Kakumäe Bay and Paljassaare Bay.^[1] The islands Naissaar and Aegna border the bay in the north, the Viimsi Peninsula to the east.

The shore waters are shallow but become deep rapidly. Tallinn Bay has a steep slope, which allows for good water exchange with the waters of the Gulf of Finland.^[2] Tallinn Bay is one of the deepest bays in Estonia, max depth is about 100 m.^[3]

The Old Town is situated close to the sheltered Tallinn Bay, which is a natural harbour and the main passenger port.^[2] Paljassaare Harbour and Bekker Harbor by Kopli Bay are used for cargo traffic. There are four public beaches on the coastline: Pirita, Stroomi, Kakumäe, and Pikakari.

In the Russo-Swedish War (1788–90) the roadstead became the site of a naval battle, in which the Swedish fleet suffered an unsuccessful attack on the Russian defence positions (see Battle of Reval).

• View at Tallinn city centre over the Tallinn Bay from Maarjamäe.
• Pirita Beach
• Coastline in Merivälja.
• Tallinn Passenger Port
• View from Paljassaare towards Pirita.
• Pikakari Beach in Paljassaare.
• Paljasaare
• Kopli Bay
• Stroomi Beach by the Kopli Bay in Pelguranna.
• View from Stroomi Beach to Väike-Õismäe.
• Boat harbour on the southern coast of Naissaar island.
• Tallinn Bay by Ivan Aivazovsky (1845).
• Tallinn Bay at winter
• Tallinn Bay in fog at sunset
• Foggy sunset at Tallinn Bay
• Tallinn Roadstead in 1816

• Bungsberg, ship
• Copterline Flight 103
• Estonian Maritime Museum
• Charles Leroux
• Tallinn Olympic Yachting Centre