The Iranian island of Qeshm is the largest island in the Persian
Gulf at roughly 1,491 sq. km. However, some consider Qeshm to be in
the Strait of Hormuz instead of the Persian Gulf proper. If Qeshm
is excluded the largest island is Bubiyan Island, which is part of
Kuwait and close to the Mesopotamian coast at 863 sq. km., but it
is uninhabited. Bahrain Island (the main island of Bahrain) would
then be the largest inhabited island (excluding Qeshm) at 572 sq.
km.