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

The 241-square-kilometre (93 sq mi) municipality is the 292nd largest by area out of the 357 municipalities in Norway. Frøya Municipality is the 176th most populous municipality in Norway with a population of 5,453. The municipality's population density is 22.6 inhabitants per square kilometre (59/sq mi), and its population has increased by 19.9% over the previous 10-year period.

The parish of Frøya was established as a municipality on 1 January 1877 when it was separated from Hitra Municipality. Its initial population was 3,949. On 1 January 1906, it was split into two municipalities: Nord-Frøya Municipality in the north and Sør-Frøya Municipality in the south. During the 1960s, there were many municipal mergers across Norway due to the work of the Schei Committee. On 1 January 1964, Nord-Frøya Municipality (population: 4,348) and Sør-Frøya Municipality (population: 2,208) were merged back together again, forming a new Frøya Municipality.

On 1 January 2018, the municipality switched from the old Sør-Trøndelag county to the new Trøndelag county.

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 feminine 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 masculine definite article in Norwegian).

The coat of arms was granted on 13 March 1987. The official blazon is "Azure, three fishhooks argent in bend" (Norwegian: I blått tre sølv angler i skrå rekke). This means the arms have a blue field (background) and the charge is a series of three fish hooks lined up diagonally. The fish hooks have a tincture of argent which means it is commonly colored white, but if it is made out of metal, then silver is used. The fish hooks mimic Stone Age hooks made of bone that are meant to symbolize the importance of fishing and trapping by the people of Frøya. The arms were designed by Einar H. Skjervold based on an idea by S. Hogstad from Kolsås.

The Church of Norway has one parish (sokn) within Frøya Municipality. It is part of the Orkdal prosti (deanery) in the Diocese of Nidaros.

Frøya Municipality has many small fishing communities on the large island of Frøya and many small islands in the ocean such as Mausund, Bogøyvær, and Sula, with Mausund being the largest of these with a population of approximately 270. Other small islands such as Froan and Halten lay to the northeast of the island of Frøya. Many of these islands are home to lighthouses such as Halten Lighthouse, Finnvær Lighthouse, Vingleia Lighthouse, Sula Lighthouse, and Sletringen Lighthouse.