Sunndalⓘ is a municipality in the Nordmøre region located in the northeast part of Møre og Romsdal county, Norway.

Other villages include Gjøra, Grøa, Hoelsand, Jordalsgrenda, Romfo, Ålvund, Ålvundeidet, and Øksendalsøra.

With an area of 1,713 square kilometres (661 sq mi), it is the largest municipality in Møre og Romsdal county.

On 3 November 1917, a royal resolution changed the spelling of the name of the municipality to Sunndal, adding an "n" and removing the definite form ending -en.

The official blazon is "Vert, a wormwood plant argent" (Norwegian: I grønt en sølv malurt).

This means the arms have a green field (background) and the charge is a Norwegian wormwood (Artemisia norvegica) plant.

It has its main European distribution in Sunndal and neighboring Oppdal in the Dovrefjell-Sunndalsfjella National Park and in Trollheimen landscape protection area.

In the southern part of the municipality lies the Dovrefjell–Sunndalsfjella National Park, home to a plentiful amount of impressive muskox.

There are also many towering mountains including: Trolla, Storskrymten, Vinnufjellet (with peaks Dronningkrona and Kongskrona), Innerdalstårnet, Salhøa, Såtbakkollen, Skarfjellet, and Vassnebba.

Atlantic lows can produce a strong foehn effect in winter as the air is forced over the mountains surrounding Sunndalsøra.