Letha (Hellen Feliciano) is a fictional supervillain appearing in American comic books published by Marvel Comics. The character has been depicted as a former member of the female villain team the Grapplers.
Letha may refer to:
- Letha (Hellen Feliciano), supervillain in the Marvel Comics Universe
- Letha, Idaho, unincorporated town in Gem County, Idaho, United States
- Letha Dawson Scanzoni (born 1935), independent scholar, author, and editor
- Letha Raney Intermediate School, middle school in Corona, California
- Letha Weapons (born 1972), adult model and former porn actress