thumb|right|Map of Scotland showing the district of Kyle
thumb|right|Kyle as the central district of Ayrshire
thumb|Old map of Kyle
Kyle (or Coila poetically; ) is a former comital district of Scotland which stretched across parts of modern-day East Ayrshire and South Ayrshire. It is supposedly named after Coel Hen, a legendary king of the Britons, who is said to be buried under a mound at Coylton.
Geographical extent
The area is bordered by the historical districts of Cunninghame to the north, Clydesdale to the east and by Carrick to the south. The Firth of Clyde lies to the west.
Kyle was the central of the three districts in the sheriffdom of Ayr (Ayrshire), which was divided naturally by its three primary rivers all running in a generally westward direction to flow into the firth of Clyde. The River Irvine forms the northern boundary of Kyle with Cunninghame; the River Doon established its southern boundary with Carrick. Additionally, Kyle itself was sub-divided into two parts. To the north of the River Ayr was "Kyle Stewart" (sometimes called "Stewart Kyle" or "Walter's Kyle"), lands held by the FitzAlans (the future Stewart Kings of Scotland) since the 12th century. To the south was "Kyle Regis" or "King's Kyle",