Mariette may signify:
- Auguste Mariette (1821-1881), pioneering Egyptologist.
- Pierre-Jean Mariette (1694-1774), connoisseur and chronicler of artistic life in Paris
- Mariette Bosch (died 2001), South African murderer executed by Botswana
- Mariette Hansson (born 1983), sometimes MaryJet or simply mononym Mariette, Swedish singer and songwriter
Vodka Mariette is a neutral spirit produced in Bordeaux, France.