Hernar is an island in Øygarden municipality in Vestland county, Norway.

Most of the settlement is in one cluster on the southwestern part of the island along the small harbor area.

Hernar has about 15 permanent inhabitants and many holiday cabins.

It is connected to the mainland via a passenger ferry service to the small island of Hellesøyna, just off the coast of Seløyna.

The ferry service is operated by Bergen Nordhordland Rutelag.