Sirdal Municipality

Sirdal is a municipality in Agder county, Norway. It is located in the northwestern part of the traditional district of Lister. The administrative centre of the municipality is the village of Tonstad. Other villages in the municipality include Bjørnestad, , , Lunde, and .

The 1,554.28-square-kilometre (600.11 sq mi) municipality is the 52nd largest by area out of the 357 municipalities in Norway. Sirdal Municipality is the 288th most populous municipality in Norway with a population of 1,911. The municipality's population density is 1.4 inhabitants per square kilometre (3.6/sq mi) and its population has increased by 4.3% over the previous 10-year period.