Alpthal is a village and municipality in Schwyz District in the Canton of Schwyz in Switzerland . Besides the village of Alpthal, the municipality includes the ski resort of Brunni, and settlement of Eigen.

Alpthal is first mentioned in 1018 as Albetal. A branch of the Camino de Santiago pilgrimage route connected Einsiedeln with Schwyz via Alpthal and the Haggenegg.

Winter tourism first came to Alpthal in 1950, with the opening of the cable car from Brunni to the Holzegg. Brunni acquired its first ski lift in 1964, and the Brunni-Haggenegg ski area was commissioned in 1974.