Grytten is a former municipality in Møre og Romsdal county, Norway. It existed from 1838 until its dissolution in 1964. The municipality encompassed the Romsdalen valley which follows the Rauma River from the Oppland county border to the inner part of the Romsdal Fjord 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). When Grytten ceased to exist in 1964, it had an overall area of 797 square kilometres (308 sq mi). The administrative centre was the village of Åndalsnes.