Dorothy Dinnerstein (April 4, 1923 – December 17, 1992) was an American feminist academic and activist, best known for her book The Mermaid and the Minotaur (1976). Using some elements of Sigmund Freud's psychoanalysis, Dinnerstein argued that sexism and aggression are both inevitable consequences of childrearing's being left more or less exclusively to women; the issues intrinsic to a child's engagement with and separation from its mother, Dinnerstein thought, end up being conflated with gender relations.

Dorothy Dinnerstein was born in a poor Jewish section of the Bronx, New York City, in 1923. As a psychologist, she worked with such well-known names as Kohler, Wertheimer, and Asch. She was a distinguished professor of psychology at Rutgers University for thirty years and lived in New Jersey until her death in a car accident in 1992.

According to Dorothy Dinnerstein’s book, The Mermaid and the Minotaur, human-animal hybrids such as the minotaur and the mermaid convey the emergent understanding of the ancients that human beings were both one with and different from animals and that, as such, humans' "nature is internally inconsistent, that our continuities with, and our differences from, the earth's other animals are mysterious and profound; and in these continuities, and these differences, lie both a sense of strangeness on earth and the possible key to a way of feeling at home here"