Mary Warren may refer to: Mary Warren (Salem witch trials) (died 1693), oldest accuser during the 1692 Salem witch trials Mary Warren (actress) (1893–1956), American actress in silent films Mary Anne Warren (1946–2010), American writer and philosophy professor Mary Evalin Warren (1829–1904), American author, lecturer, and social reformer Mary Schäffer Warren (1861–1939), American-Canadian naturalist, illustrator, photographer, and writer