Thalia, (Ancient Greek: Θάλεια), meaning "the joyous the abundance" is a common female name in the Greek pantheon, being given to:
- Thalia, the goddess of festivity and banquets and the eldest member of The Three Graces/Charites.
- Thalia, the goddess of idyllic poetry and comedy and the second youngest member of The Nine Muses.
- Thalia, one of the 50 Nereids (Sea Nymphs).
- Thalia, a Naiad-nymph of Mount Etna.