Gower (Welsh: Gŵyr) or the Gower Peninsula (Penrhyn Gŵyr) in southwest Wales, projects towards the Bristol Channel. It is the most westerly part of the historic county of Glamorgan. In 1956, the majority of Gower became the first area in the United Kingdom to be designated an Area of Outstanding Natural Beauty.

Until 1974, Gower was administered as a rural district. It was then merged with the county borough of Swansea. From 1974 to 1996, it formed the Swansea district. Since 1996, Gower has been administered as part of the unitary authority of the City and County of Swansea.

Since its establishment in 1999, the Gower Senedd constituency has only elected Labour members. The Gower constituency in Westminster had previously also elected only Labour Members of Parliament (MPs) since 1908; the longest run (with Normanton and Makerfield) of any UK constituency. This ended in 2015 when the Conservatives took the seat. In 2017, it returned to Labour. The area of both constituencies covers the peninsula and the outer Gower areas of Clydach, Gowerton, Gorseinon, Felindre, Garnswllt and encompasses the area of the historic Lordship of Gower apart from the city of Swansea.