Tydal is a municipality in Sør-Trøndelag county, Norway. The administrative centre of the municipality is the village of Ås. Other villages include Østby, Gressli, Aunet, and Stugudalen. There is a school and a kindergarten in Tydal.The approximately 850 inhabitants in Tydal earn a living in farming, forestry, energy production, and tourism. During Easter, the number of people in Tydal increases by up to 5,000 people.