Lake Davos () is a small natural lake at Davos, Switzerland. Its surface area is 0.59 kmò and the maximum depth is 54 m. Fed by sources of the Rhine, Flüelabach and Totalpbach, among other mountain creeks, the lake is used as a hydropower reservoir; its water no longer flows to the river Landwasser but is channeled into the river Landquart at Klosters.