Lavik og Brekke is a former municipality in the old Sogn og Fjordane county in Norway. It is in the present-day municipalities of Gulen and Høyanger in Vestland county. It was part of the traditional district of Sogn. The 427-square-kilometre (165 sq mi) municipality was located along the Sognefjorden, at the western end of the fjord, just east of the mouth. The municipality existed from 1861 until 1905. The administrative center of Lavik og Brekke was the village of Lavik. There were two churches in the municipality: Lavik Church in Lavik on the north side of the fjord and Brekke Church in Brekke on the south side of the fjord.