Janet's Foss is a small waterfall near the village of Malham, North Yorkshire, England.

The pool was traditionally used for sheep dipping, an event which drew in local village inhabitants for the social occasion.

[1] The name Janet (sometimes Jennet) is believed to refer to a fairy queen reputed to inhabit a cave at the rear of the fall.

[1] Foss is a Nordic word for waterfall, still used in Scandinavia, and is presented in a number of cases in England as 'force'.

[2] Janet's Foss was the location of the fictional Molkham Falls featured in the 2006 independent British film Waterfall.