Frøya is the westernmost municipality in Sør-Trøndelag county, Norway. It is part of the Fosen region and it consists of the island of Frøya which lies north of Hitra, as well several thousand other small islands surrounding the island of Frøya. The village of Sistranda is the administrative center of Frøya. Other villages include Hammarvika, Titran, Sula, and Mausund. The main island of Frøya is connected to neighboring Hitra (and ultimately the mainland of Norway) by the Frøya Tunnel which goes under the Frøyfjorden.

The municipality of Frøya was established on 1 January 1877 when it was separated from Hitra to become a municipality of its own. Its initial population was 3,949. On 1 January 1906, it was split into two municipalities: Nord-Frøya and Sør-Frøya. That however, was short-lived. On 1 January 1964, Nord-Frøya and Sør-Frøya were merged back together again, forming a new municipality of Frøya.

The name of the island and municipality come from Norse mythology. Although Frøya is a variant of the name of the Norse goddess Freyja, the Old Norse form of the name of the island was Frøy or Frey (the ending -a in the modern form is actually the definite article - so the meaning of Frøya is 'the Frøy'). Therefore, the name of the island probably has the same root as the name of the Norse god Freyr, brother to Freyja. The names originally were titles: "lord" or "lady". The oldest meaning of the common word was "(the one) in front; the foremost, the leading" and here in the sense "the island in front of Hitra". Until 1906 the island and municipality name was spelled Frøien (-en is the definite article in Danish-Norwegian).

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