Hitra is a municipality and an island in Sør-Trøndelag county, Norway. The municipality covers the island of Hitra and several smaller islands, and is part of the Fosen region. With a land area of , the island of Hitra is the seventh largest island in mainland Norway, and the largest island south of the Arctic Circle.
The administrative centre of the municipality is the village of Fillan. Other villages include Andersskogan, Ansnes, Forsnes, Hestvika, Knarrlagsund, Kvenvær, Melandsjøen, Nordbotn, Sandstad, and Ulvan.
Hitra is famous in Norway for its large and dense population of Red Deer (as symbolised in its coat of arms — see image right). Hitra is a member of the International Island Games Association.