The 28.6-square-kilometre (11.0 sq mi) island is entirely located in the municipality of Arendal in Agder county, Norway.

There is also a passenger ferry that takes six minutes to transport riders from Skilsø to the town of Arendal.

It is a designer and supplier of all types of deck machinery and mooring systems for marine and offshore applications.

The name of the island (originally the parish) historically was Tromø, but more recently it has been spelled Tromøy or Tromøya.

It also says that his daughter, Queen Åsa Haraldsdatter, took her one-year-old son, Halfdan Svarte back to Tromøya after the death of Gudrød Veidekonge.

Hove is an area located on the southwestern part of Tromøya which has easily cultivated due to its self-draining soil and it was therefore a convenient place for early agriculture.

[3][4] During the Occupation of Norway by Nazi Germany (1940-1945), the Germans had an anti-aircraft school on Tromøya called the Feld Flakartillerie-schule 50.

[6] A 1750s-era model of Dronningen av Danmark, a frigate based in Copenhagen, hangs from the ceiling of the church's nave.

Headliners for the first year included the American bands Slayer, The Killers, Queens of the Stone Age, and My Chemical Romance.