| Item | Synonyms | Description |
|---|---|---|
| Ultra Mac | ||
| Ulvanisceva | ||
| Umpqua Late Sweet | ||
| Undlne | ||
| Unity | ||
| Upton Pyne | Primarily a cooking variety, notable for a delicate pineapple-like flavour. Cooks to puree. | |
| Uralian Butter | ||
| Uralian Winter Apple | ||
| Uralskoje Nalivonje | ||
| Uster Apfel | ||
| Utter | ||
| Uttwiler Sptlauber | An old Swiss apple variety, enjoying new-found popularity because of its alleged anti-aging properties. |