Osterfjorden is a
fjord in
Hordaland county,
Norway. The fjord is one of three fjords surrounding the island of
Osterøy. The fjord runs along the municipal border of
Lindås and
Osterøy municipalities. The fjord begins at the
Romarheimsfjorden and flows to the west for before ending near the village of
Knarvik at the
confluence of four fjords: Osterfjorden,
Radfjorden (to the north),
Sørfjorden (to the south), and
Salhusfjorden (to the west). The Osterfjorden is generally about wide and the deepest point in the fjord reaches a depth of below sea level.