Mariette may signify:
;Family name:
*Auguste Mariette (1821–1881), pioneering Egyptologist.
*Pierre-Jean Mariette (1694–1774), connoisseur and chronicler of artistic life in Paris
;Given name:
*Mariette Bosch (died 2001), South African murderer executed by Botswana
*Mariette Hansson (born 1983), sometimes MaryJet or simply mononym Mariette, Swedish singer and songwriter
;Others
*Mariette (yacht), ''Mariette'', a yacht built by Nathanael Greene Herreshoff in 1915
{{given name, type=both
