The lac des Joncs is a small mountain lake located in Les Paccots, canton of Fribourg, in Switzerland.

The lac des Joncs is a protected site registered on the Swiss Federal Inventory of Amphibian Spawning Areas.

It's one of the four places in Switzerland where it's possible to spot the dwarf water lily.

To help protect the fragile environment of the lake and for safety reasons, swimming, boating, or diving is not allowed.

This article related to a lake in the canton of Fribourg is a stub.