Sidol is a small settlement in the Tuhinj Valley in the Municipality of Kamnik in the Upper Carniola region of Slovenia. It lies in a small enclosed valley in the hills above Šmartno v Tuhinju.

The Municipality of Kamnik is a municipality in northern Slovenia. The seat of the municipality is the town of Kamnik. Today it is part of the Central Slovenia Statistical Region. It is the 15th-largest municipality by area in Slovenia.