The Sea of Swords is a body of water in the Forgotten Realms

Forgotten Realms

The Forgotten Realms is a campaign setting for the Dungeons & Dragons fantasy role-playing game. Commonly referred to by players and game designers alike as "The Realms", it was created by game designer Ed Greenwood around 1967 as a setting for his childhood stories...

 fantasy world, located off the Sword Coast in the northwestern part of Faerûn

Faerûn

Faerûn is a fictional subcontinent, the primary setting of the Dungeons & Dragons world of Forgotten Realms. It is described at a relatively high level in the Forgotten Realms Campaign Setting from Wizards of the Coast, and various locales and aspects are described in more detail by separate...

. The Moonshae Isles forms the sea's western boundary while the Nelanther Isles

Nelanther Isles

The Nelanther Isles is a location on Faerûn, a fictional continent, the primary setting of the Forgotten Realms, for Dungeons & Dragons.-Description:...

 and the Tethyr Peninsula defines its southern extent. The sea has no exact northern border, but it is clear that the border is north of Waterdeep

Waterdeep (city)

Waterdeep is a fictional city-state that forms part of a popular Dungeons & Dragons fantasy role-playing game campaign setting called the Forgotten Realms. It is a port city that is located along the western coast of the Faerûn sub-continent...

.

The sea is named for its numerous pirate attacks upon the shipping route extending from Waterdeep in the north, to Calimshan in the south. Piracy in the region is rampant despite the efforts of the natives of various Sword Coast ports and pirate hunters.

Ships operating in the Sea of Swords often carry on trade between the ports of Luskan, Neverwinter

Neverwinter

Neverwinter is a fictional city-state in the Forgotten Realms campaign setting for the Dungeons & Dragons fantasy role-playing game. Neverwinter was founded by Lord Halueth Never...

, Waterdeep

Waterdeep (city)

Waterdeep is a fictional city-state that forms part of a popular Dungeons & Dragons fantasy role-playing game campaign setting called the Forgotten Realms. It is a port city that is located along the western coast of the Faerûn sub-continent...

, Baldur's Gate

Baldur's Gate (city)

Baldur's Gate is a fictional city in the Forgotten Realms campaign setting of the Dungeons & Dragons fantasy role-playing game. It is a coastal city on the north bank of the river Chiontar, located in the Western Heartlands region of Faerûn...

, Athkatla

Athkatla

Athkatla is a fictional city in the Forgotten Realms campaign setting for the Dungeons & Dragons fantasy role-playing game. It is the capital of the nation of Amn, which in turn is a country on the continent of Faerûn...

, Murann, Velen, Zazesspur, Myratma, Memmon, and Calimport.