The Gulag Archipelago, a novel about the Soviet slave labor and concentration camp system by Aleksandr Solzhenitsyn

Duchy of the Archipelago, a maritime state created in the Aegean Sea (the Cyclades) in the aftermath of the Fourth Crusade

Bismarck Archipelago Campaign, a military campaign from 15 December 1943 to 27 November 1944

NYSE Arca, an abbreviation of Archipelago Exchange, an online stock exchange owned by the NYSE Group

Archipelago, a landform which consists of a chain or cluster of islands

The Archipelago, Ontario, a township in Canada on Georgian Bay

Archipelago Tomorrow, a local right-wing French political movement