Mary Nichols

Mary Nichols may refer to:


 * Mary D. Nichols (born 1945), chairwoman of the California Air Resources Board
 * Mary Pickering Nichols (1829–1915), American translator of German literature
 * Mary Nichols (politician) (born 1949), member of the Missouri House of Representatives
 * Mary Ann Nichols (1845–1888), one of the Whitechapel murder victims
 * Mary Gove Nichols (1810–1884), American woman's rights and health reform advocate, and writer