Osterøy is an
island situated northeast of the city of
Bergen in
Hordaland county,
Norway. With a total area of , it is the largest Norwegian island not located directly adjacent to the
ocean, and the second largest such island in
Northern Europe. Osterøy is covered by two municipalities: the majority by
Osterøy municipality, and the rest by
Vaksdal municipality. The vast majority of the island's population lives in Osterøy municipality (7,305 inhabitants as of 2008).