Arendal kommune | 3,369 followers on LinkedIn. Livskvalitet og bærekraftig vekst – sammen skaper vi fremtiden. | Arendal is a city and municipality in the county of Aust-Agder, Norway. Arendal is the administrative center of Aust-Agder county, and belongs to the geographical region of Sørlandet. The municipality is bordered in the southwest by Grimstad, in the northwest by Froland, and in the northeast by Tvedestrand municipalities.