The municipality sits on the island of Osterøy, and it is surrounded by several fjords: Osterfjorden-Romarheimsfjorden, Sørfjorden, and Veafjorden. The highest mountain in the municipality is the tall Høgafjellet on the municipal border with Vaksdal. The Lonevågen fjord cuts in the center of the island, with the village of Lonevåg sitting at the end of the fjord.