Lac de Chambon, Reservoir on the Creuse in Indre and Creuse, France

Lac de Chambon is a 16 km reservoir on the Creuse river, held back by the Éguzon hydroelectric dam at 203.7 m altitude. It reaches 751 m across and covers 312 ha, holding 57.2 million m³. Its banks lie in Éguzon-Chantôme, Cuzion, Saint-Plantaire and Crozant, in the Indre and Creuse departments.

The Lac de Chambon was created in 1926 by the Éguzon hydroelectric dam on the Creuse river. In September 2017 the water level was lowered by about 8 metres to 193.5 m NGF for the dam's ten-year technical inspection.

The lake hosts the Fête du Lac each summer and has held European speed waterskiing championships. A foot ferry links Chambon on the left bank with Fougères on the right from Easter to All Saints' Day. Three beaches serve bathers: Bonnu at Cuzion, Chambon at Éguzon-Chantôme and Fougères at Saint-Plantaire.

The lake has multiple entry points and parking areas, with the main beach at Chambon offering the best facilities. During summer months, supervised swimming areas and equipment rental services are available for water sports.

The lake is not the only Lac Chambon in France: a Lac Chambon lies in Puy-de-Dôme and a Lac du Chambon in Isère. The Creuse here is also held back by the Éguzon dam, whose ten-year inspection in September 2017 required lowering the water level by about 8 metres, to 193.5 NGF.