Tanafjord or Tanafjorden (Northern Sami: Deanuvuotna) is a fjord in Finnmark, Norway. Its orientation is mainly north-south, spanning approximately 66 kilometres from the Smalfjord settlement in the south to Barents Sea in the north. The fjord separates the Nordkinn Peninsula in the west from the Varanger Peninsula in the east. The Tana river empties into the southern part of the fjord.