Vorderthal is a municipality in March District in the Canton of Schwyz in Switzerland .

Vorderthal has an area, as of 2006, of 28 km2 (11 sq mi). Of this area, 35.3% is used for agricultural purposes, while 59.8% is forested. Of the rest of the land, 2% is settled (buildings or roads) and the remainder (2.9%) is non-productive (rivers, glaciers or mountains).

Vorderthal has a population (as of 31 December 2020) of 1,014. As of 2007, 6.3% of the population was made up of foreign nationals.