Mary Nichols
Mary Nichols may refer to:
- Mary D. Nichols, chairwoman of the California Air Resources Board
- Mary Pickering Nichols, American translator of German literature
- Mary Nichols (politician), member of the Missouri House of Representatives
- Mary Ann Nichols, one of the Whitechapel murder victims
- Mary Gove Nichols, American woman's rights and health reform advocate, and writer