Valle is a municipality in Aust-Agder county, Norway. It is part of the traditional district of Setesdal. The administrative center is the village of Valle.Valle was established as a municipality on 1 January 1838 . The area of Bykle (population: 476) was separated from the municipality of Valle on 1 January 1902. This left Valle with 1,720 inhabitants. On 1 July 1915, the area of Hylestad (population: 658) was separated from the municipality of Valle (remaining population: 1,051). On 1 January 1962, Hylestad (population: 662) and Valle (population: 902) were merged back into one municipality named Valle.