Ørskog is a municipality in Møre og Romsdal county, Norway. It is part of the Sunnmøre region. The administrative centre is the village of Sjøholt. The other main village is Vaksvika, about 7.5 kilometres (4.7 mi) south of Sjøholt. The European Route E39/E136 highway runs through the municipality, connecting the towns of Ålesund and Molde. Rauma Group is the largest company in Ørskog in terms of turnover.

Ørskog was established as a municipality on 1 January 1838 (see formannskapsdistrikt). On 1 August 1883, the southwestern district of Ørskog (most of Ørskog on the southwestern side of the Storfjorden except for the Søvik and Ramstaddalen areas) was separated to form the new Søkelven Municipality. This left Ørskog with 1,735 inhabitants. On 1 June 1955, the Søvik and Ramstaddalen areas of Ørskog (south of the Storfjorden) were administratively transferred to Sykkylven Municipality. On 1 January 1965, Skodje Municipality (to the west) and Stordal Municipality (to the south) were merged into Ørskog to form a new, large Ørskog Municipality. This merger was not long-lived. On 1 January 1977, the three municipalities were separated again.

The municipality (originally the parish) is named after the old Ørskog farm (Old Norse: Øyraskógr), since the first church (Ørskog Church) was built there. The first element is the plural genitive case of øyrr which means "shoal" and the last element is skógr which means "wood" or "forest".

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