Brekken is a former municipality in the old Sør-Trøndelag county, Norway. The 843-square-kilometre (325 sq mi) municipality existed along the border with Sweden from 1926 until its dissolution in 1964. The municipality is now located in the northeastern part of what is now the municipality of Røros in Trøndelag county. The municipality encompassed the areas located to the north, east and southeast of the lake Aursunden. The administrative centre was the village of Brekken where Brekken Church is located.