ArendalArendal (ˈɑ̂ːɳɖɑːɫ) is a municipality in Agder county in southeastern Norway. Arendal belongs to the region of Sørlandet. The administrative centre of the municipality is the city of Arendal (which is also the seat of Agder county). Some of the notable villages in Arendal include Rykene, Eydehavn, Færvik, Strengereid, Kongshavn, Kilsund, Brattekleiv, Torsbudalen, Longum, Saltrød, Staubø, Vrengen, and Kolbjørnsvik. The offices of UNEP/GRID-Arendal are also located in the city of Arendal.
TromøyTromøy (historic: Tromø) is a former municipality in the old Aust-Agder county in Norway. The municipality existed from 1878 until its dissolution in 1992. The municipal area is now part of the municipality of Arendal in Agder county. The administrative centre was the village of Brekka, where the historic Tromøy Church is located. The municipality encompassed all of the island of Tromøya as well as many smaller surrounding islands such as Merdø, Gjesøya, Skilsøy, and Tromlingene.
HisøyHisøy (historically: Hisø) is a former municipality in the old Aust-Agder county in Norway. The municipality existed from 1881 until 1992 when it was merged into the municipality of Arendal in what is now Agder county. At the time of its dissolution, it was the smallest municipality in the whole county. The municipality encompassed the islands of Hisøya, Gjervoldsøy, Havsøya, Ærøya, Store Torungen, Lille Torungen, and several other small, unpopulated islands. The administrative centre was the village of Kolbjørnsvik on Hisøya island.
ØyestadØyestad is a former municipality in the old Aust-Agder county in Norway. The municipality existed from 1838 until 1992 when it was merged into the present-day municipality of Arendal which is now located in Agder county. At the time of its dissolution, the municipality of Øyestad encompassed most of the coastline between the towns of Grimstad and Arendal, along with the forested areas along the Nidelva river heading inland. Back in 1838, however, the municipality was far larger in size.