Buøy is an island in the borough of Hundvåg in the city of Stavanger in Rogaland county, Norway. The island was formerly separated from the island of Hundvåg by a small channel of water, but that was filled in. Buøy is connected to the mainland city of Stavanger by a series of bridges over three other islands and the Byfjorden.
Buøy is also the name of an official neighborhood (delområde) of the city. The neighborhood has a population of 1,792 which is distributed over an area of including the islands of Buøy, Engøy, Sølyst, and Grasholmen.