Grytten is a former municipality in Møre og Romsdal county, Norway. The municipality encompassed the Romsdalen valley which follows the Rauma River from the Oppland county border to the Romsdalsfjorden at the town of Åndalsnes, as well as some smaller side valleys. The original municipality of Grytten was almost identical to the present-day Rauma Municipality, plus the southern part of Veøy Municipality (south of the Langfjorden).