Gildeskål is a municipality in Nordland county, Norway. It is part of the Salten traditional region. The administrative centre of the municipality is the village of Inndyr. Gildeskål was established as a municipality on 1 January 1838 (see formannskapsdistrikt). Beiarn was separated from Gildeskål in 1853. Gildeskål is part of the Bodø Region.
The municipality (originally the parish) is named after the old Gildeskål farm (Old Norse: Gildaskáli), since the first church was built there. The first element is the plural genitive case of gildi which means "feast" or "banquet" and the last element is skáli which means "hall".The coat-of-arms is from modern times (1988). The arms show a cup which is a canting of the meaning of the name Gildeskål.