Øyestad is a former municipality in the old Aust-Agder county in Norway. The 96-square-kilometre (37 sq mi) 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. The administrative centre was the village of Bjorbekk near the Bjorbekk Church.