Many major battles were fought there during World War II.

The International Hydrographic Organization defines the limits of the Solomon Sea as follows:[1] On the Northwest.

By the Southeast limit of Bismarck Sea [A line from the Southern point of New Ireland along the parallel of 4°50' South to the coast of New Britain, along its Northern coast and thence a line from its Western extreme through the Northern point of Umboi Island to Teliata Point, New Guinea (5°55′S 147°24′E / 5.917°S 147.400°E / -5.917; 147.400)].

By the coast of New Guinea and a line from its Southeasternmost point through the Louisiade Archipelago to Rossel Island.

These islands received their name "Islas Salomón" from the legend of the biblical land of Ophir — fabled as the source of King Solomon's wealth which was hoped to be discovered, in the first 1568 voyage by their discoverer Spanish navigator Álvaro de Mendaña de Neira.