Sør-Varanger (Northern Sami: Máttá-Várjjat, Kven: Etelä-Varenki, Finnish: Etelä-Varanki) is a municipality in Finnmark county, Norway. The administrative centre of the municipality is the town of Kirkenes. Sør-Varanger was separated from the municipality of Vadsø on 1 July 1858.