Galloway (Scottish Gaelic: Gall-Ghàidhealaibh [ˈkal̪ˠaɣəl̪ˠu]; Scots: Gallowa; Latin: Gallovidia) is a region in southwestern Scotland comprising the historic counties of Wigtownshire and Kirkcudbrightshire. It is administered as part of the council area of Dumfries and Galloway.

A native or inhabitant of Galloway is called a Gallovidian. The place name Galloway is derived from the Gaelic i nGall Gaidhealaib ("amongst the Gall Gaidheil"). The Gall Gaidheil, literally meaning "Stranger-Gaidheil"; the specific identity of whom the term was applied to is unknown, but the predominant view is that it referred to an ethnic and/or cultural identity such as the Strathclyde Britons or another related but distinct population. A popular theory is that it refers to a population of mixed Scandinavian and Gaelic ethnicity that may have inhabited Galloway in the Middle Ages.

Galloway is bounded by sea to the west and south, the Galloway Hills to the north, and the River Nith to the east; the border between Kirkcudbrightshire and Wigtownshire is marked by the River Cree. The definition has, however, fluctuated greatly in size over history.

A hardy breed of black, hornless cattle named Galloway cattle is native to the region, in addition to the more distinctive 'Belted Galloway' or 'Beltie'.