River Ayr

River Ayr
The River Ayr Looking towards Alder Glen, from the River Ayr Way.
Native nameUisge Àir (Scottish Gaelic)
Location
CountryScotland
CountiesAyrshire
SettlementsAyr, Catrine, Muirkirk
Physical characteristics
SourceGlenbuck Loch
  locationMuirkirk, Scotland
MouthAyr Harbour, Firth of Clyde
  location
Ayr, Scotland
Length65 km (40 mi)
Discharge 
  locationLugar Water
Basin features
Tributaries 
  leftLugar Water, Garpel Water
  rightGreenock Water

The River Ayr (pronounced like air, Uisge Àir in Gaelic) is a river in Ayrshire, Scotland. At 65 km (40 mi) it is the longest river in the county.

The river was held as sacred by pre-Christian cultures. The remains of several prehistoric sacrificial horse burials have been found along its banks, mainly concentrated around the town of Ayr.