Åmli is a municipality in Agder county, Norway. It is located in the traditional region of Sørlandet. The main population centre and administrative center is the village of Åmli which lies along the river Nidelva. Other villages in Åmli include Askland, Dølemo, Eppeland, Flaten, Hillestad, Homdrom, Lauveik, Nelaug, Øvre Ramse, Skjeggedal, Tveit, Vehus, and Ytre Ramse.
The municipality is the 98th largest by area out of the 356 municipalities in Norway. Åmli is the 292nd most populous municipality in Norway with a population of 1,801. The municipality's population density is and its population has decreased by 1.3% over the previous 10-year period.
The municipality (originally the parish) is named after the old Åmli farm (Almlíð) since the first Åmli Church was built there. The first element is almr which means "elm tree" or "elm wood". The last element is hlíð which means "slope" or "hillside". Historically, the name was historically spelled Omlid before being changed to Aamli. The 1917 Norwegian language reform law changed the spelling from using the digraph "Aa" to using the letter Å instead (Åmli).
The coat of arms was granted on 23 October 1987. The official blazon is "Azure, a beaver rampant regardant argent" (På blå grunn ein oppreist sølv bever med hovudet vendt bakover). This means the arms have a blue field (background) and the charge is a beaver. The beaver has a tincture of argent which means it is commonly colored white or gray, but if it is made out of metal, then silver is used. The beaver was chosen because the Åmli area was one of the few remaining beaver habitats in Europe. By the late 19th century, only about 100 beavers were left in Europe, mostly in the Åmli area. They were protected and after World War I, the beavers from this area have been used to help re-populate other areas in Europe where the beaver had gone extinct in the wild. The arms were designed by Odd Einar Ufsvatn who won a competition for designing the arms. The municipal flag has the same design as the coat of arms.