Sørfjord is 30-kilometer fjord around Osterøy, Norway; stretching from Veafjord in the east ot Osterfjord in the north. Along Sørfjord are the villages Bruvik, Vaksdal, Haus, Garnes, Ytre Arna, Hylkje, Breistein, Valestrandsfossen, Steinstø and Hamre.
Prior to the opening of Osterøy Bridge in 1997 there were two ferries crossing the fjord; Haus - Garnes and Valestrandsfossen - Breistein, only the latter remaining.