Three Scandinavian states are the world‘a leaders in terms of islands being part of their national territory.
Sweden is home to 221,800 mostly uninhabited islands. This number includes islands as small as 270 square feet (25 square meters), which is about the size of a one-car garage.
Finland, the runner-up, has an estimated 188,000 islands, while Norway, which rounds out the top three, is a long way behind, with around 55,000.
In general, this fact is explained by geological history and climate of these Nordic countries.