sør-varanger (northern sami: máttá-várjjat, "kven": etelä-varenki, finnish: etelä-varanki, russian: сёр-вара́нгер) is a municipality in the county of troms og finnmark, norway. the administrative centre of the municipality is the town of kirkenes. located west of the norway–russia border, sør-varanger is the only norwegian municipality that shares a land border with russia, with the only legal border crossing at storskog.