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Sirdal's population is 1,766.
The area of Sirdal is 1,555 square kilometers.
The population density of Sirdal is 1 people per square kilometer.
Vest-Agder includes Mandal, Vennesla, Sogne, Farsund, Flekkefjord, Lyndal, Songdalen, Kvinesdal, Lindesnes, Marnardal, Sirdal, Audnedal, Haegebostad, and Aseral. Kristiansand is the largest.