Le Massegros is a former commune in the Lozère department in southern France. On 1 January 2017, it was merged into the new commune Massegros Causses Gorges.

The municipality was established on 1 January 2017 by merger of the former communes of Le Massegros (the seat), Le Recoux, Saint-Georges-de-Lévéjac, Saint-Rome-de-Dolan and Les Vignes.

The village gave its name to the western part of the Causse de Sauveterre located between the Gorges du Tarn and Sévérac-le-Château. This village is located in the middle of fertile land. Its name comes from Occitan "Mas a gro" or "Mas à grain" because good land produced wheat, which was quite rare on the causse.

This hamlet developed in the late eighteenth and early nineteenth century around livestock fairs held several times a year.