The Tanafjord or Tanafjorden is a large fjord in Finnmark county, Norway. It is located in the municipalities of Tana, Gamvik, and Berlevåg. Its orientation is mainly north-south, reaching approximately from the small village of Smalfjord in Tana Municipality in the south to the mouth of the fjord at the Barents Sea. The fjord separates the Nordkinn Peninsula (Gamvik Municipality) in the west from the Varanger Peninsula (Berlevåg Municipality) in the east.