Deatnu (Northern Sami) or Tana (Norwegian) is a municipality in Finnmark county, Norway. The administrative centre of the municipality is the village of Tana Bru. Other villages in the municipality include Austertana, Bonakas, Polmak, Rustefjelbma, and Skiippagurra.

The Tana ( or ; ; ; ), is a long river in the Sápmi area of northern Scandinavia. The river flows through Finnmark county, Norway and the Lapland region of Finland. The Sámi name means "Great River". The main tributaries of Tana are Anarjohka and Karasjohka.