An archipelago is a chain or cluster of islands. The word archipelago literally means "chief sea", from Greek arkhon (arkhi-) ("leader") and pelagos ("sea"). In antiquity, the Archipelago (Greek: Αρхιπέλαγος) was the proper name for the Aegean Sea and, later, usage shifted to refer to the Aegean Islands (since the sea is remarkable for its large number of islands). It is now used to generally refer to any island group or, sometimes, to a sea containing a large number of scattered islands like the Aegea. Archipelagoes are usually found in the open sea; less commonly, a large land mass may neighbor them. Archipelagoes are often volcanic, forming along mid-ocean ridges or hotspots, but there are many other processes involved in their construction, including erosion and deposition. The four largest modern states that are mainly archipelagos are Japan, the Philippines, New Zealand and Indonesia (the world's largest archipelagic state according to the CIA World Factbook) [1]. The largest archipelago in the world by size is in Northern Canada, situated in the Arctic Ocean.
See also
- Island arc
- Geography
- Earth science
- Geomorphology
- List of landforms
- Plate tectonics
- Island nation
- The World
- Lists of islands: see List of archipelagos and List of islands


