The municipality of Snillfjord lies south of the Trondheimsleia and east of the Hemnfjorden. The �stfjorden and Snillfjorden flow east from the Hemnfjorden into the municipality. The lake V�vatnet lies on the border with Orkdal in the southeast. The island of Hemnskjela lies in the Trondheimsleia in the north, and it is the southern entrance to the Hitra Tunnel.
The 508-square-kilometre (196 sq mi) municipality of Snillfjord is surrounded by four municipalities. The municipality of Hemnelies to the southwest, Hitra is to the northwest, Agdenes to the northeast, and Orkdal to the southeast
