I've added a map featuring the "traditional" recruiting areas of the old Scottish regiments to "A Quick Guide to the Scottish Regiments". The move towards fixed recruiting areas for each regiment was well in train by the 1870s and the boundaries pretty much set by the 1881 Cardwell Reforms. But even then, those boundaries were not set in stone. The Royal Scots Fusiliers had to turn the Galloway area over the King's Own Scottish Borderers in around 1900. The map reflects the recruiting areas around the time of the First World War.
I'm no artist and the map's not the greatest. If anyone spots a major error, let me know and I'll alter the map.
Space restrictions mean the map shows Glasgow as solely Highland Light Infantry territory. The Cameronians (Scottish Rifles) also recruited heavily in Glasgow. Once again, space restrictions mean the Cameronians' recruiting area is labeled "Scot. Rifles". During the First World War only the 1st Battalion of the regiment went by Cameronians, all the other battalions called themselves the Scottish Rifles. In the Second World War all the battalions called themselves Cameronians.
Glasgow provided recruits to all the Scottish regiments. Lacking any cities or major population centres, the Queen's Own Cameron Highlanders and the Seaforth Highlanders both had a hard time filling their wartime ranks from their recruiting areas. An old Cameron, captured with much of the old 51st Highland Division at St. Valery in 1940, used to joke "Moskovitz, Schellenberg, O'Hara, Snodgrass, Goldberg, - A Company Cameron Highlanders reporting for duty, Sir."
The Scots Guards and the Scots Greys both recruited from throughout Scotland. Anyway, I hope some you find the map helpful.