| Cormac MacCarthy Mor | |
| King of Desmond | |
| Reign: | 1326–1359 |
| Predecessor: | Dermot MacCarthy Mor |
| Successor: | Donal Og MacCarthy Mor |
| Issue: | Donal Og; Dermot MacCarthy, Lord of Muskerry; & others |
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| Father: | Donal MacCarthy |
| Birth Date: | 1271 |
| Death Date: | 1359 |
Cormac MacCarthy Mor (1271–1359) was a King of Desmond.
Cormac was born in 1271, probably the third son of Donal Og MacCarthy who died in 1306.
MacCarthy had at least three sons. Two of them are quite well known: