The Lac de Bonlieu (English: Lake of Bonlieu) is a lake in the Jura department, Bourgogne-Franche-Comté, France. It is named after the commune of Bonlieu.
The shoreline is composed of peat bogs, surrounded by a forest of beech and fir trees, and the lake is accessible from the north by a walking path. The lake's dark blue colour is due to limestone and marl in the lakebed.
The lake is a popular spot for fishing, with perch, roach, rudd and sculpins to be caught.
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