The Fluebrig is a mountain massif of the Schwyzer Alps, located east of Unteriberg in the canton of Schwyz, Switzerland. It is composed of several summits of which the highest is named Diethelm () and the second highest Turner ().
The Fluebrig overlooks the Lake of Sihl (towards north-west) and the Lake of Wägital (towards north-east). The Fläschenspitz is located on the ridge south of Fluebrig.