The dioceses of Scotland in the High and Later Middle Ages were:
| Diocese | Cathedral | Notes | |
|---|---|---|---|
| Aberdeen | Old Aberdeen | see sometimes said to have been translater from Mortlach (now Dufftown) in 1132 - but this origin countered by claim that Aberdeen Cathedral and diocese were fresh creations | |
| Argyll | Lismore | it was suggested moving the cathedral to Saddell Abbey, but this did not transpire | |
| Brechin | Brechin | ||
| Caithness | Dornoch | cathedral originally at Halkirk | |
| Dunblane | Dunblane | prior to settling at Dunblane, cathedrals were at Abernethy (probably) and Muthill. A proposal to move the cathedral from Dunblane to Inchaffray Abbey did not transpire. | |
| Dunkeld | Dunkeld | ||
| Galloway | Whithorn | earlier cathedral of Candida Casa nearby. | |
| Glasgow | Glasgow | Metropolitan since 1492 | |
| Moray | Elgin | prior to settling at Elgin, cathedrals were at Birnie, Spynie and at Kinneddar | |
| Orkney | Kirkwall | cathedral originally at Birsay | |
| Ross | Fortrose | cathedral originally at Rosemarkie | |
| St Andrews | St Andrews | Metropolitan since 1472. earlier cathedral (church of St Regulus) nearby. | |
| The Isles | Iona | diocese founded at Old St German's Cathedral, Peel Castle, Isle of Man as the Diocese of Sodor comprising the Hebrides and the Isle of Man. When the Isle of Man came under English control in the 14th century the Scottish Diocese of the Isles was created, covering the Hebrides only, with its original cathedral at Skeabost, Isle of Skye |