Cumnock and Doon Valley (Scottish Gaelic: Cumnag agus Srath Dhùin) was one of nineteen local government districts in the Strathclyde region of Scotland from 1973 to 1995. The district was created by the Local Government (Scotland) Act 1973 from part of the county of Ayr, namely: * The burgh of Cumnock and Holmhead * The district of Cumnock * Most of the district of Dalmellington The district council's headquarters were at Lugar, near Cumnock.