List of islands of Denmark
This is a list of islands of Denmark.
There are about 406 islands in Denmark, not including the Faroe Islands or Greenland. Some 70 of them are populated but the remainder are uninhabited. Some of the uninhabited islands have only become uninhabited in recent decades, for economic reasons.
Different lists of Danish islands vary, depending on how the word "island" is defined. According to the official Danish Government definition, an "island" needs to be surrounded by water at least one-half metre deep and also have land vegetation growing on it to be recorded as such.
Another common criterion is that an "island" needs to be surrounded by free-flowing, natural water and not just an artificial, narrow canal. According to this criterion, places such as Christianshavn and Holmen in Copenhagen, although sometimes referred to as artificial islands, are actually parts of the island of Amager.
Dynamic number 
The number of islands in Denmark changes from time to time. New islands are occasionally formed by sedimentation. Several examples of these new islands are found in the waters around Æbelø, north of Funen, including Drætlingen which formed in the late 1990s, and a still unnamed islet that was registered in 2008. These new islands are generally less stable than larger, morainic islands, and may later disappear again. Other islands are created artificially. Peberholm, formed in the process of construction of the Øresund Bridge, is a notable example. Other artificial Danish islands include a number of marine fortresses off Copenhagen, such as Middelgrundsfortet, Trekroner Fort and Flakfortet.
Islands may also disappear. An example of this is Jordsand, one of the Danish Wadden Sea Islands. According to records from 1231, the island then had an area of about 2000 hectares (8 square miles). After a series of bad storms during that century, its area had decreased to around 41 hectares, and by 1763 to around 18 hectares. By 1895 Jordsand had ceased to exist.
In other cases, islands are absorbed by larger neighbouring masses of dry land, as a result of either natural sedimentation or artificial land reclamation in the channels separating them. Sometimes this means that an island becomes a cape or headland.
Denmark's second largest island, the North Jutlandic Island, was not always an island. A storm on 3 February 1825 penetrated the narrow land mass, Agger Tange, and thus separated Northern Jutland from the rest of Jutland. The area had earlier been an island, when a strait at Vust had been open prior to the 12th century.
List of 100 largest Danish islands 
This is a list of the largest islands of Denmark (Press the symbol after the headings in the table to rearrange the list according to population size, location or alphabetically):
Other populated islands 
Areas sometimes referred to as islands 
- Jordsand, a former island
- Vejlø, a peninsula but in some sources referred to as an island
- Christianshavn, considered part of Amager Island
- Holmen, considered part of Christianshavn/Amager
Other small unpopulated islands 
See also 
- Statistics Denmark Populated islands
- National survey authority
- Danish Wikipedia List of inhabited islands