The counties assigned to the various Scottish regiments as recruiting areas by the time of the First World War were as follows –
Royal Scots – City of Edinburgh, County of Edinburgh (Mid Lothian), Haddingtonshire (East Lothian) and Linlithgowshire (West Lothian)and Peeblesshire.
Royal Scots Fusiliers – Ayrshire
King’s Own Scottish Borderers – Berwickshire, Drumfrieshire, Roxburghshire, Kirkcubrightshire, and Selkirkshire.
Cameronians (Scottish Rifles) – Lanarkshire and Parts of Glasgow
Black Watch – Fife, Forfarshire and Perthshire.
Highland Light Infantry – Glasgow.
Seaforth Highlanders – Caithness, Cromarty, Elginshire, Nairnshire, Orkney, Ross-shire, Sutherland.
Gordon Highlanders – Aberdeenshire, Banffshire, Shetland and Kincardineshire.
Queen's Own Cameron Highlanders - Inverness-shire.
Argyll and Sutherland Highlanders – Argyllshire, Bute-shire, Clackmananshire, Dumbartonshire, Kinross-shire, Renfrewshire and Stirlingshire.
The Royal Scots Greys and the Scots Guards recruited from across Scotland.
Map
This is an improved version of the map in the Quick Guide to the Scottish Regiments courtesy of the Scotland's War team.