The Château de Menthon is a medieval castle located in the commune of Menthon-Saint-Bernard, 12 kilometres (7.5 mi) south of Annecy in the Haute-Savoie department of France.

Standing on a 200 metres (660 ft) tall rock, its stone towers loom over Lake Annecy, the Roc de Chère National Nature Reserve, and Menthon-Saint-Bernard.

[1] The first fortress was erected in the 10th century, around 923; it was originally a simple wooden guard post, built on a promontory dominating the ancient Roman road and Lake Annecy.

François de Menthon, father of the present count, was a lawyer and member of the Resistance who represented France at the Nuremberg Trials.

The library contains more than 12,000 works from before 1800, including incunabula and ancient manuscripts written on parchment, sheepskin or goatskin, with painted illuminations from monks of the Middle Ages.