Celtic cities are cities that can be founded by the Celtic civilization in Civilization V and its expansions. The first city founded is the 
Capital Capital, and the names of future cities are chosen in the order they appear on the list below.
The names listed are default names; players can change their cities' names if they choose.
Celtic city names are drawn from the six modern "Celtic nations" of Scotland, Ireland (Republic of Ireland and Northern Ireland), Wales, Cornwall, Brittany and the Isle of Man. They appear in that order, with the first being Scottish, the second Irish, the third Welsh, and so on.
| Founding Order | City Name | Notes |
|---|---|---|
| 1 | Edinburgh | Formerly a city-state; constituent capital of Scotland, United Kingdom |
| 2 | Dublin | Formerly a city-state; capital of the Republic of Ireland |
| 3 | Cardiff | Constituent capital of Wales, United Kingdom |
| 4 | Truro | Cornwall |
| 5 | Nantes | "Cultural" capital of Brittany, France; historic capital of Duchy of Brittany |
| 6 | Douglas | Capital of Isle of Man |
| 7 | Glasgow | Largest city in Scotland, third largest city in the United Kingdom |
| 8 | Cork | Republic of Ireland |
| 9 | Aberystwyth | Wales |
| 10 | Penzance | Cornwall |
| 11 | Rennes | Brittany, France |
| 12 | Ramsey | Isle of Man, also the name of an island of Wales |
| 13 | Inverness | Scotland |
| 14 | Limerick | Republic of Ireland |
| 15 | Swansea | Wales |
| 16 | St. Ives | Cornwall |
| 17 | Brest | Brittany, France |
| 18 | Peel | Isle of Man or Cumbria, England |
| 19 | Aberdeen | Scotland |
| 20 | Belfast | Constituent capital of Northern Ireland, United Kingdom |
| 21 | Caernarfon | Wales |
| 22 | Newquay | Cornwall |
| 23 | Saint-Nazaire | Brittany, France |
| 24 | Castletown | Isle of Man |
| 25 | Stirling | Scotland |
| 26 | Galway | Republic of Ireland |
| 27 | Conwy | Wales |
| 28 | St. Austell | Cornwall |
| 29 | Saint-Malo | Brittany, France |
| 30 | Onchan | Isle of Man |
| 31 | Dundee | Scotland |
| 32 | Londonderry | Northern Ireland, generally referred to as Derry |
| 33 | Llanfairpwllgwyngyll | Wales; unlocks an achievement when founded |
| 34 | Falmouth | Cornwall |
| 35 | Lorient | Brittany, France |