Gratangen (Norwegian) or Rivtták (Northern Sami)[5][6] is a municipality in Troms county, Norway.

[10] On 1 January 2020, the municipality became part of the newly formed Troms og Finnmark county.

[7] On 16 February 2024, the national government approved a resolution to add a co-equal, official Sami language name for the municipality: Rivttága suohkan.

It is called Rivtták when it is spelled alone, but it is Rivttága suohkan when using the Sami language equivalent to "Gratangen Municipality".

The official blazon is "Azure, a chevron embowed argent" (Norwegian: I blått en innbøyd sølv sparre).

The chevron has a tincture of argent which means it is commonly colored white, but if it is made out of metal, then silver is used.

The municipality is very mountainous, with only one third of the land being below the tree line of 250 to 300 metres (820 to 980 ft) above sea level.

The municipal council (Kommunestyre) of Gratangen is made up of 15 representatives that are elected to four year terms.