Fairy Cup may refer to:
- The object in Fairy cup legends
- Fungi
- Humaria hemisphaerica, or "hairy fairy cup", or "brown-haired fairy cup"
- Bisporella citrina, or "yellow fairy cups"
- Peziza praetervisa, or "purple fairy cup"
- Peziza violacea, or "violet fairy cup"
- Any of the lichenized fungi of the genus Xanthoria