Radøy is an island municipality in the county of Hordaland, Norway. Radøy was created as a new municipality on 1 January 1964, after the merger of large parts of Hordabø, Manger, and Sæbø, and smaller parts of Austrheim and Lindås.
The coat-of-arms is from modern times. They were granted on 16 June 1991. The arms shows two black oarlocks on a yellow field. Oarlocks are on the gunwale of a boat and they support the oar and give force to the rower's stroke. The designer was Even Jarl Skoglund.