Finhaut is a municipality in the district of Saint-Maurice in the canton of Valais in Switzerland .

Finhaut is first mentioned in 1293 as Finyaux.

Finhaut has an area, as of 2011, of 22.8 square kilometers (8.8 sq mi). Of this area, 3.2% is used for agricultural purposes, while 26.3% is forested. Of the rest of the land, 2.6% is settled (buildings or roads) and 67.8% is unproductive land.

The municipality is located in the Saint-Maurice District , in the upper Trient valley on the French border.