| Post: | Countess |
| Body: | Devon |
| Incumbent: | Allison Joy Courtenay |
| Termlength: | As long as married to the Earl of Devon |
| First: | Adelize de Baalun |
| Formation: | 1141 (first creation) 1553 (fifth and present creation) |
| Member Of: | Peerage of England |
| Style: | The Right Honourable |
| Seat: | Powderham Castle |
Countess of Devon is a title that may be held by a woman in her own right or used by the wife of the Earl of Devon. Women who have held the title include: