Agder is a traditional county and region in southern Norway, coinciding with the South Norway region. Located in the far south of Norway, the county is notable for its idyllic, tree-lined valleys nestled between rugged mountains and forested wilderness. The county's population was 308,843 in 2021. With its long stretches of white sandy beaches dotted with swaying palm trees, Kristiansand is Agder's largest city.