The Lac d'Aiguebelette (French pronunciation: [lak dɛɡbəlɛt]; Lake of Aiguebelette) is a natural lake north of the Chartreuse Mountains in the French Alps and just west of the Chaîne de l'Épine in the Jura Mountains.

It is located within five communes in the Savoie department: Aiguebelette-le-Lac, Lépin-le-Lac, Saint-Alban-de-Montbel, Novalaise and Nances.

[1][2] With a surface area of 5.45 km2 (2.10 sq mi) it is one of the largest natural lakes of France.

The communities of Aiguebelette-le-Lac, Lépin-le-Lac, Saint-Alban-de-Montbel, Novalaise and Nances border the lake, while the Chaîne de l'Épine ridge lies to the east with its high point at Mont Grêle (1,425 metres or 4,675 ft), south-southeast of the lake.

The Chaîne de l'Épine ridge is crossed by hiking trails; paragliders launch from there during the summer.