Plateau de Diesse (French pronunciation: [plato də djɛs]) is a municipality in the Jura bernois administrative district in the Canton of Bern in Switzerland , located in the French-speaking Bernese Jura (Jura Bernois). On 1 January 2014 the former municipalities of Diesse, Lamboing and Prêles merged into the municipality of Plateau de Diesse.

Diesse is first mentioned in 1178 as Diesse. In German it was known as Tess though this is no longer commonly used.

The parish church of Diesse was first mentioned in 1185. Beginning in 1530 the Protestant Reformation gradually gained power until the parish switched to the new faith in 1554.