Thomatal is a municipality in the district of Tamsweg, in the state of Salzburg, Austria. It lies in the Lungau region, the southeastern part of Salzburg known for its alpine landscape and relatively high elevation.
As a municipality, Thomatal is one of the smaller administrative units within the Tamsweg district, which is the only district in Salzburg that corresponds to the historic Lungau area. The district's municipalities are predominantly rural and mountainous.